Finite Mathematics & Its Applications (12th Edition)
12th Edition
ISBN: 9780134507125
Author: Goldstein
Publisher: PEARSON
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Chapter 10, Problem 10FCCE
To determine
The meaning of the term 'future value of annuity', 'present value' and 'rent'.
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Answer questions 8.3.3 and 8.3.4 respectively
8.3.4 .WP An article in Medicine and Science in Sports and
Exercise [“Electrostimulation Training Effects on the Physical Performance of Ice Hockey Players” (2005, Vol. 37, pp.
455–460)] considered the use of electromyostimulation (EMS) as
a method to train healthy skeletal muscle. EMS sessions consisted of 30 contractions (4-second duration, 85 Hz) and were carried
out three times per week for 3 weeks on 17 ice hockey players.
The 10-meter skating performance test showed a standard deviation of 0.09 seconds. Construct a 95% confidence interval of the
standard deviation of the skating performance test.
8.6.7 Consider the tire-testing data in Exercise 8.2.3. Compute a 95% tolerance interval on the life of the tires that has confidence level 95%. Compare the length of the tolerance interval with the length of the 95% CI on the population mean. Which interval is shorter? Discuss the difference in interpretation of these two intervals.
8.6.2 Consider the natural frequency of beams described in
Exercise 8.2.8. Compute a 90% prediction interval on the
diameter of the natural frequency of the next beam of this type
that will be tested. Compare the length of the prediction interval
with the length of the 90% CI on the population mean.
8.6.3 Consider the television tube brightness test described in
Exercise 8.2.7. Compute a 99% prediction interval on the brightness of the next tube tested. Compare the length of the prediction
interval with the length of the 99% CI on the population mean.
Chapter 10 Solutions
Finite Mathematics & Its Applications (12th Edition)
Ch. 10.1 - Solution can be found following the section...Ch. 10.1 - Solution can be found following the section...Ch. 10.1 - Calculate the future amount of $2000 after 6...Ch. 10.1 - In Exercises 1–6, given the values of i and n...Ch. 10.1 - In Exercises 1–6, given the values of i and n...Ch. 10.1 - In Exercises 1–6, given the values of i and n...Ch. 10.1 - In Exercises 16, given the values of i and n under...Ch. 10.1 - In Exercises 16, given the values of i and n under...Ch. 10.1 - In Exercises 1–6, given the values of i and n...Ch. 10.1 - In Exercises 712, given the values of i, n, P, and...
Ch. 10.1 - In Exercises 712, given the values of i, n, P, and...Ch. 10.1 - In Exercises 7–12, given the values of i, n, P,...Ch. 10.1 - In Exercises 7–12, given the values of i, n, P,...Ch. 10.1 - Prob. 11ECh. 10.1 - In Exercises 712, given the values of i, n, P, and...Ch. 10.1 - In Exercises 1338, solve each problem. Future...Ch. 10.1 - In Exercises 1338, solve each problem. Future...Ch. 10.1 - In Exercises 1338, solve each problem. Future...Ch. 10.1 - In Exercises 13–38, solve each problem.
16. Future...Ch. 10.1 - In Exercises 1338, solve each problem. Future...Ch. 10.1 - Prob. 18ECh. 10.1 - In Exercises 13–38, solve each...Ch. 10.1 - In Exercises 1338, solve each problem. Present...Ch. 10.1 - In Exercises 1338, solve each problem. Savings...Ch. 10.1 - In Exercises 13–38, solve each...Ch. 10.1 - In Exercises 1338, solve each problem. Comparing...Ch. 10.1 - In Exercises 1338, solve each problem. Comparing...Ch. 10.1 - In Exercises 13–38, solve each...Ch. 10.1 - In Exercises 13–38, solve each...Ch. 10.1 - Prob. 27ECh. 10.1 - In Exercises 1338, solve each problem. Interest If...Ch. 10.1 - Prob. 29ECh. 10.1 - In Exercises 13–38, solve each...Ch. 10.1 - In Exercises 1338, solve each problem. Interest If...Ch. 10.1 - In Exercises 1338, solve each problem. Interest If...Ch. 10.1 - In Exercises 1338, solve each problem. Savings...Ch. 10.1 - In Exercises 13–38, solve each...Ch. 10.1 - In Exercises 13–38, solve each...Ch. 10.1 - In Exercises 1338, solve each problem. Interest...Ch. 10.1 - In Exercises 1338, solve each problem. Savings...Ch. 10.1 - In Exercises 1338, solve each problem. Savings...Ch. 10.1 - Exercises 39–52 concern simple...Ch. 10.1 - Exercises 39–52 concern simple...Ch. 10.1 - Exercises 3952 concern simple interest. Future...Ch. 10.1 - Exercises 39–52 concern simple...Ch. 10.1 - Exercises 39–52 concern simple...Ch. 10.1 - Exercises 3952 concern simple interest. Present...Ch. 10.1 - Exercises 3952 concern simple interest. Interest...Ch. 10.1 - Exercises 3952 concern simple interest. Interest...Ch. 10.1 - Exercises 3952 concern simple interest. Time...Ch. 10.1 - Exercises 3952 concern simple interest. Time...Ch. 10.1 - Exercises 3952 concern simple interest. Time...Ch. 10.1 - Exercises 3952 concern simple interest. Interest...Ch. 10.1 - Exercises 3952 concern simple interest. Present...Ch. 10.1 - Exercises 39–52 concern simple interest.
52. Time...Ch. 10.1 - Future Value Compute the future value after 1 year...Ch. 10.1 - Future Value Compute the future value after 1 year...Ch. 10.1 - Effective Rate of Interest In Exercises 5558,...Ch. 10.1 - Effective Rate of Interest In Exercises 5558,...Ch. 10.1 - Effective Rate of Interest In Exercises 55–58,...Ch. 10.1 - Effective Rate of Interest In Exercises 55–58,...Ch. 10.1 - Prob. 59ECh. 10.1 - Savings Account During the 1990s, a deposit was...Ch. 10.1 - Prob. 61ECh. 10.1 - Prob. 62ECh. 10.1 - Prob. 63ECh. 10.1 - Doubling Time(True or False) An investment growing...Ch. 10.1 - Prob. 65ECh. 10.1 - Future Value If your stock portfolio gained 20% in...Ch. 10.1 - 67. Comparing Investments The same amount of money...Ch. 10.1 - Prob. 68ECh. 10.1 - Prob. 69ECh. 10.1 - Prob. 70ECh. 10.1 - Prob. 71ECh. 10.1 - Prob. 72ECh. 10.1 - Prob. 73ECh. 10.1 - Prob. 74ECh. 10.1 - Prob. 75ECh. 10.1 - 76. Savings Account Ten thousand dollars is...Ch. 10.1 - Prob. 77ECh. 10.1 - Prob. 78ECh. 10.1 - Comparing Investments Consider the following two...Ch. 10.1 - 80. Comparing Investments Consider the following...Ch. 10.2 - Solutions can be found the section exercises....Ch. 10.2 - Prob. 2CYUCh. 10.2 - Prob. 3CYUCh. 10.2 - Exercises 1 and 2 describe increasing annuities....Ch. 10.2 - Exercises 1 and 2 describe increasing annuities....Ch. 10.2 - Exercises 3 and 4 describe decreasing annuities....Ch. 10.2 - Exercises 3 and 4 describe decreasing annuities....Ch. 10.2 - In Exercises 5 and 6, calculate the future value...Ch. 10.2 - In Exercises 5 and 6, calculate the future value...Ch. 10.2 - In Exercises 7 and 8, calculate the rent of the...Ch. 10.2 - In Exercises 7 and 8, calculate the rent of the...Ch. 10.2 - In Exercises 9 and 10, calculate the present value...Ch. 10.2 - In Exercises 9 and 10, calculate the present value...Ch. 10.2 - In Exercises 11 and 12, calculate the rent of the...Ch. 10.2 - In Exercises 11 and 12, calculate the rent of the...Ch. 10.2 - Savings Account Ethan deposits $500 into a savings...Ch. 10.2 - Savings Account Emma deposits $2000 into a savings...Ch. 10.2 - Prob. 15ECh. 10.2 - Savings Account A person deposits$5000 into a...Ch. 10.2 - In Exercises 17–20, determine the amount of...Ch. 10.2 - In Exercises 1720, determine the amount of...Ch. 10.2 - In Exercises 1720, determine the amount of...Ch. 10.2 - Prob. 20ECh. 10.2 - Comparing Payouts Is it more profitable to receive...Ch. 10.2 - Comparing Payouts Is it more profitable to receive...Ch. 10.2 - Comparing Bonus Plans When Bridget takes a new...Ch. 10.2 - Comparing Lottery Payouts A lottery winner is...Ch. 10.2 - College Allowance During Jacks first year at...Ch. 10.2 - Magazine Subscription Suppose that a magazine...Ch. 10.2 - 27. Savings Account Suppose that $1000 was...Ch. 10.2 - Savings Account Suppose that you opened a savings...Ch. 10.2 - 29. Savings Account Ms. Jones deposited $100 at...Ch. 10.2 - Prob. 30ECh. 10.2 - Prob. 31ECh. 10.2 - Savings Account How much money must you deposit...Ch. 10.2 - Prob. 33ECh. 10.2 - Prob. 34ECh. 10.2 - Municipal Bond A municipal bond pays 4% interest...Ch. 10.2 - Present Value What is the present value of a loan...Ch. 10.2 - 37. Business Loan A business loan for $200,000...Ch. 10.2 - 38. Lottery Payoff A lottery winner is to receive...Ch. 10.2 - Prob. 39ECh. 10.2 - A sinking fund is an increasing annuity set up by...Ch. 10.2 - Prob. 41ECh. 10.2 - A sinking fund is an increasing annuity set up by...Ch. 10.2 - Prob. 43ECh. 10.2 - Prob. 44ECh. 10.2 - Prob. 45ECh. 10.2 - Prob. 46ECh. 10.2 - Prob. 47ECh. 10.2 - Prob. 48ECh. 10.2 - A deferred annuity is a type of decreasing annuity...Ch. 10.2 - Prob. 50ECh. 10.2 - Prob. 51ECh. 10.2 - Prob. 52ECh. 10.2 - Prob. 53ECh. 10.2 - Prob. 54ECh. 10.2 - Prob. 55ECh. 10.2 - Prob. 56ECh. 10.2 - Prob. 57ECh. 10.2 - In Exercises 51–58, give the settings or...Ch. 10.2 - Prob. 59ECh. 10.2 - 60. Time Interval A person deposits $800 at the...Ch. 10.2 - Prob. 61ECh. 10.2 - Home Repairs Fund Bob needs $3064 to have some...Ch. 10.2 - Prob. 63ECh. 10.3 - Solution can be found following the section...Ch. 10.3 - Solution can be found following the section...Ch. 10.3 - Solution can be found following the section...Ch. 10.3 - 1. Loan Payment A car loan of $10,000 is to be...Ch. 10.3 - Loan Payment A loan of $5000 is to be repaid with...Ch. 10.3 - Loan Payment A loan of $4000 is to be repaid with...Ch. 10.3 - Loan Payment A loan of $3000 is to be repaid with...Ch. 10.3 - Loan Amount The weekly payment on a 2-year loan at...Ch. 10.3 - Loan Amount The quarterly payment on a 5-year loan...Ch. 10.3 - Mortgage Payment Find the monthly payment on a...Ch. 10.3 - 8. Mortgage Payment Find the monthly payment on a...Ch. 10.3 - 9. Mortgage Amount Find the amount of a 30-year...Ch. 10.3 - Mortgage Amount Find the amount of a 25-year...Ch. 10.3 - Mortgage Balance A 30-year mortgage at 4.2%...Ch. 10.3 - 12. Mortgage Balance A 25-year mortgage at 4.5%...Ch. 10.3 - 13. Loan Interest A loan with a weekly payment of...Ch. 10.3 - Loan Interest A loan with a quarterly payment of...Ch. 10.3 - Amortization Schedule Write out a complete...Ch. 10.3 - Amortization Schedule Write out a complete...Ch. 10.3 - 17. Mortgage Consider a $204,700, 30-year mortgage...Ch. 10.3 - 18. Mortgage James buys a house for $370,000. He...Ch. 10.3 - 19. Car Loan Susie takes out a car loan for $9480...Ch. 10.3 - Loan Consider a $21,281.27 loan for 7 years at 8%...Ch. 10.3 - Prob. 21ECh. 10.3 - Comparing Financing Options In a recent year, Ford...Ch. 10.3 - 23. Comparing Financing Options A bank makes the...Ch. 10.3 - Buy Now or Later? According to an article in the...Ch. 10.3 - Balloon Payment A loan is to be amortized over an...Ch. 10.3 - 26. Balloon Payment A loan of $127,000.50 is to be...Ch. 10.3 - 27. Car Loan A car is purchased for $6287.10, with...Ch. 10.3 - Prob. 28ECh. 10.3 - Prob. 29ECh. 10.3 - Prob. 30ECh. 10.3 - Terminating a Mortgage In 2006, Emma purchased a...Ch. 10.3 - Refinancing a Mortgage A real estate speculator...Ch. 10.3 - Prob. 33ECh. 10.3 - Prob. 34ECh. 10.3 - Total of Loan Payment Suppose that you borrow...Ch. 10.3 - 36. Loan Amount Suppose that you borrow money at...Ch. 10.3 - Let Bn= balance of a loan after n payments, In=...Ch. 10.3 - Let QnandIn be as defined in Exercise 37. a. Use...Ch. 10.3 - Prob. 39ECh. 10.3 - Prob. 40ECh. 10.3 - Prob. 41ECh. 10.3 - Prob. 42ECh. 10.3 - Prob. 43ECh. 10.3 - In Exercises 39–46, give settings or statements to...Ch. 10.3 - Prob. 45ECh. 10.3 - Prob. 46ECh. 10.3 - Prob. 47ECh. 10.3 - Prob. 48ECh. 10.3 - Debt Reduction A loan of $10,000 at 9% interest...Ch. 10.3 - 50. Debt Reduction A loan of $4000 at 6% interest...Ch. 10.3 - Prob. 51ECh. 10.3 - Prob. 52ECh. 10.4 - Solution can be found following the section...Ch. 10.4 - Prob. 2CYUCh. 10.4 - Prob. 3CYUCh. 10.4 - Prob. 1ECh. 10.4 - Prob. 2ECh. 10.4 - Prob. 3ECh. 10.4 - Prob. 4ECh. 10.4 - Prob. 5ECh. 10.4 - Comparing IRAs Rework Examples 1 and 3 for the...Ch. 10.4 - Roth IRA Rework Exercise 5 for a Roth IRA.Ch. 10.4 - 8. Comparing IRAs Rework Examples 1 and 3 for the...Ch. 10.4 - Value of Starting an IRA Early Redo Example 4...Ch. 10.4 - Prob. 10ECh. 10.4 - Prob. 11ECh. 10.4 - Prob. 12ECh. 10.4 - Prob. 13ECh. 10.4 - Prob. 14ECh. 10.4 - Prob. 15ECh. 10.4 - Prob. 16ECh. 10.4 - Prob. 17ECh. 10.4 - Prob. 18ECh. 10.4 - Prob. 19ECh. 10.4 - Prob. 20ECh. 10.4 - Prob. 21ECh. 10.4 - Prob. 22ECh. 10.4 - Prob. 23ECh. 10.4 - Prob. 24ECh. 10.4 - Prob. 25ECh. 10.4 - 26. True or False Refer to Example 10. If the...Ch. 10.4 - Prob. 27ECh. 10.4 - APR In multiple-choice Exercises 2730, assume that...Ch. 10.4 - Prob. 29ECh. 10.4 - Prob. 30ECh. 10.4 - Prob. 31ECh. 10.4 - Effective Mortgage Rate In multiple-choice...Ch. 10.4 - Prob. 33ECh. 10.4 - Prob. 34ECh. 10.4 - Prob. 35ECh. 10.4 - Prob. 36ECh. 10.4 - Prob. 39ECh. 10.4 - Prob. 40ECh. 10.4 - Interest-Only Mortgage Consider a 15-year mortgage...Ch. 10.4 - 42. Interest-Only Mortgage Consider a 15-year...Ch. 10.4 - 43. Adjustable-Rate Mortgage Consider a 25-year...Ch. 10.4 - Prob. 44ECh. 10.4 - Prob. 45ECh. 10.4 - Prob. 46ECh. 10.4 - Prob. 47ECh. 10.4 - Prob. 48ECh. 10.4 - Prob. 49ECh. 10.4 - Prob. 50ECh. 10.4 - Prob. 51ECh. 10.4 - Prob. 52ECh. 10.4 - Prob. 53ECh. 10.4 - Prob. 54ECh. 10.4 - Prob. 55ECh. 10.4 - Prob. 56ECh. 10.5 - Solution can be found following the section...Ch. 10.5 - Prob. 2CYUCh. 10.5 - Prob. 1ECh. 10.5 - Prob. 2ECh. 10.5 - Prob. 3ECh. 10.5 - In Exercises 1–10, give a difference equation for...Ch. 10.5 - In Exercises 1–10, give a difference equation for...Ch. 10.5 - Prob. 6ECh. 10.5 - Prob. 7ECh. 10.5 - Prob. 8ECh. 10.5 - Prob. 9ECh. 10.5 - Prob. 10ECh. 10.5 - In Exercises 11 and 12, answer the questions....Ch. 10.5 - In Exercises 11 and 12, answer the questions....Ch. 10.5 - Prob. 13ECh. 10.5 - In Exercises 1318, (a) determine the first five...Ch. 10.5 - Prob. 15ECh. 10.5 - Prob. 16ECh. 10.5 - Prob. 17ECh. 10.5 - Prob. 18ECh. 10.5 - Prob. 19ECh. 10.5 - Prob. 20ECh. 10.5 - Prob. 21ECh. 10.5 - Prob. 22ECh. 10.5 - Prob. 23ECh. 10.5 - Prob. 24ECh. 10.5 - Prob. 25ECh. 10.5 - Prob. 26ECh. 10.5 - Prob. 27ECh. 10.5 - Prob. 28ECh. 10.5 - Prob. 29ECh. 10.5 - Prob. 30ECh. 10.5 - Prob. 31ECh. 10.5 - In Exercises 1938, use difference equations to...Ch. 10.5 - In Exercises 1938, use difference equations to...Ch. 10.5 - In Exercises 19–38, use difference equations to...Ch. 10.5 - Prob. 35ECh. 10.5 - Prob. 36ECh. 10.5 - Prob. 37ECh. 10.5 - Prob. 38ECh. 10.5 - Prob. 39ECh. 10.5 - Prob. 40ECh. 10.5 - Prob. 41ECh. 10.5 - Elevation and Atmospheric Pressure The atmospheric...Ch. 10.5 - Prob. 43ECh. 10.5 - Prob. 44ECh. 10.5 - Prob. 45ECh. 10.5 - Prob. 46ECh. 10.5 - Prob. 47ECh. 10.5 - Prob. 48ECh. 10.5 - Prob. 50ECh. 10 - 1. What is meant by principal?
Ch. 10 - Prob. 2FCCECh. 10 - 3. What is meant by the balance in a savings...Ch. 10 - Prob. 4FCCECh. 10 - Prob. 5FCCECh. 10 - Prob. 6FCCECh. 10 - Prob. 7FCCECh. 10 - 8. Explain the difference between the nominal and...Ch. 10 - Prob. 9FCCECh. 10 - Prob. 10FCCECh. 10 - Prob. 11FCCECh. 10 - Prob. 12FCCECh. 10 - Prob. 13FCCECh. 10 - Prob. 14FCCECh. 10 - Prob. 15FCCECh. 10 - Prob. 16FCCECh. 10 - Prob. 17FCCECh. 10 - Prob. 18FCCECh. 10 - How are finance charges on a consumer loan...Ch. 10 - Prob. 20FCCECh. 10 - Prob. 21FCCECh. 10 - Prob. 22FCCECh. 10 - Prob. 23FCCECh. 10 - Prob. 24FCCECh. 10 - Prob. 25FCCECh. 10 - Prob. 26FCCECh. 10 - Prob. 1RECh. 10 - Prob. 2RECh. 10 - Prob. 3RECh. 10 - Prob. 4RECh. 10 - Prob. 5RECh. 10 - Prob. 6RECh. 10 - Nonstandard Mortgage A real estate investor takes...Ch. 10 - Prob. 8RECh. 10 - Prob. 9RECh. 10 - Prob. 10RECh. 10 - Prob. 11RECh. 10 - Prob. 12RECh. 10 - Prob. 13RECh. 10 - Prob. 14RECh. 10 - Prob. 15RECh. 10 - Prob. 16RECh. 10 - Prob. 17RECh. 10 - Prob. 18RECh. 10 - Prob. 19RECh. 10 - Prob. 20RECh. 10 - Prob. 21RECh. 10 - Prob. 22RECh. 10 - Prob. 23RECh. 10 - Prob. 24RECh. 10 - Prob. 25RECh. 10 - Prob. 26RECh. 10 - Prob. 27RECh. 10 - Prob. 28RECh. 10 - Prob. 29RECh. 10 - Prob. 30RECh. 10 - Prob. 31RECh. 10 - Prob. 32RECh. 10 - Prob. 33RECh. 10 - Prob. 34RECh. 10 - Interest-Only Mortgage Consider a 25-year mortgage...Ch. 10 - 36. Adjustable-Rate Mortgage Consider a 25-year...Ch. 10 - Prob. 37RECh. 10 - Prob. 38RECh. 10 - Prob. 39RECh. 10 - Prob. 40RECh. 10 - Prob. 41RECh. 10 - Prob. 42RECh. 10 - Prob. 43RECh. 10 - Prob. 44RECh. 10 - Prob. 45RECh. 10 - Prob. 46RECh. 10 - Prob. 47RECh. 10 - Prob. 48RECh. 10 - Suppose that a $100,000 investment grows 3% during...Ch. 10 - Prob. 2PCh. 10 - 3. Consider an annuity in which $100,000 is...Ch. 10 - Rework Exercise 3, where the interest rate is 4%...Ch. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - 7. Show that, if an investment of P dollars earns ...Ch. 10 - 8. Which of the following two statements is true?...Ch. 10 - Show that, if $1000 is invested at 8% interest...Ch. 10 - Prob. 10PCh. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - Prob. 15P
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- Answer question S8 stepwisearrow_forwardAnswer questions 8.2.11 and 8.2.12 respectivelyarrow_forward8.4.2 An article in Knee Surgery, Sports Traumatology, Arthroscopy [“Arthroscopic Meniscal Repair with an Absorbable Screw: Results and Surgical Technique” (2005, Vol. 13, pp. 273–279)] showed that only 25 out of 37 tears (67.6%) located between 3 and 6 mm from the meniscus rim were healed. a. Calculate a two-sided 95% confidence interval on the proportion of such tears that will heal. b. Calculate a 95% lower confidence bound on the proportion of such tears that will heal. 8.4.3 An article in the Journal of the American Statistical Association [“Illustration of Bayesian Inference in Normal Data Models Using Gibbs Sampling” (1990, Vol. 85, pp. 972–985)] measured the weight of 30 rats under experiment controls. Suppose that 12 were underweight rats. a. Calculate a 95% two-sided confidence interval on the true proportion of rats that would show underweight from the experiment. b. Using the point estimate of p obtained from the preliminary sample, what sample size is needed to be 95%…arrow_forward
- 8.4.8 Use the data from Exercise 8.4.2 to compute the two-sided Agresti-Coull CI on the proportion of tears that heal. Compare and discuss the relationship of this interval to the one computed in Exercise 8.4.2.arrow_forwardAnswer questions 8.3.7 and 8.4.1 respectivelyarrow_forwardDon't do 14. Please solve 19arrow_forward
- 8.4.7 Use the data from Exercise 8.4.5 to compute the two-sided Agresti-Coull CI on the proportion of digits read correctly. Compare and discuss the relationship of this interval to the one computed in Exercise 8.4.5.arrow_forward8.6.5 Consider the fuel rod enrichment data described in Exercise 8.2.11. Compute a 90% prediction interval on the enrichment of the next rod tested. Compare the length of the prediction interval with the length of the 99% CI on the population mean.arrow_forward8.4.4 The Arizona Department of Transportation wishes to survey state residents to determine what proportion of the population would like to increase statewide highway speed limits from 65 mph to 75 mph. How many residents does the department need to survey if it wants to be at least 99% confident that the sample proportion is within 0.05 of the true proportion? 8.4.5 The U.S. Postal Service (USPS) has used optical character recognition (OCR) since the mid-1960s. In 1983, USPS began deploying the technology to major post offices throughout the country (www.britannica.com). Suppose that in a random sample of 500 handwritten zip code digits, 466 were read correctly. a. Construct a 95% confidence interval for the true proportion of correct digits that can be automatically read. b. What sample size is needed to reduce the margin of error to 1%? c. How would the answer to part (b) change if you had to assume that the machine read only one-half of the digits correctly?arrow_forward
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