Practical Business Math Procedures
12th Edition
ISBN: 9781259540554
Author: Jeffrey Slater, Sharon Wittry
Publisher: McGraw-Hill Education
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Chapter 1, Problem 9PT
To determine
The amount that Ling Wong will receive as change.
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Answer question S8 stepwise
Answer questions 8.2.11 and 8.2.12 respectively
8.4.2 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
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b. Using the point estimate of p obtained from the preliminary sample, what sample size is needed to be 95%…
Chapter 1 Solutions
Practical Business Math Procedures
Ch. 1.1 - Write in verbal form:
7,948
...Ch. 1.1 - Prob. 2PQCh. 1.1 - Kellogg’s reported its sales as five million, one...Ch. 1.1 - Write in verbal form:
8,682
...Ch. 1.1 - Prob. 2EPQCh. 1.1 - Kellogg’s reported its sales as three million, two...Ch. 1.1 - Express the following numbers in verbal...Ch. 1.1 - Write in numeric form:
Eighty thousand, two...Ch. 1.1 - Round the following numbers:
To the nearest...Ch. 1.1 - Round off each number to the nearest ten, nearest...
Ch. 1.1 - Name the place position (place value) of the...Ch. 1.1 - Gim Smith was shopping for an Apple computer. He...Ch. 1.1 - Amy Parker had to write a check at the bookstore...Ch. 1.1 - Matt Schaeffer was listening to the news and heard...Ch. 1.1 - Jackie Martin is the city clerk and must go to the...Ch. 1.1 - A government survey revealed that 25,963,400...Ch. 1.1 - Bob Donaldson wished to present his top student...Ch. 1.1 - Nancy Morrissey has a problem reading large...Ch. 1.2 - Add by totaling each separate column:
Ch. 1.2 - Estimate by rounding all the way (do not round the...Ch. 1.2 - Subtract and check your answer:
Ch. 1.2 - Jackson Manufacturing Company projected its year...Ch. 1.2 - Add by totaling each separate column:
Ch. 1.2 - Estimate by rounding all the way (do not round the...Ch. 1.2 - Subtract and check your answer:
Ch. 1.2 - Jackson Manufacturing Company projected its year...Ch. 1.2 - Add by totaling each separate column:
Ch. 1.2 - Prob. 2AHCh. 1.2 - Prob. 3AHCh. 1.2 - Subtract and check:
Ch. 1.2 - Prob. 5AHCh. 1.2 - Prob. 6AHCh. 1.2 - Prob. 7AHCh. 1.2 - Prob. 8AHCh. 1.2 - Prob. 9AHCh. 1.2 - Prob. 10AHCh. 1.2 - Prob. 11AHCh. 1.2 - Prob. 12AHCh. 1.2 - Prob. 13AHCh. 1.3 - Estimate the actual problem by rounding all the...Ch. 1.3 - Prob. 2PQCh. 1.3 - Prob. 3PQCh. 1.3 - Prob. 4PQCh. 1.3 - Prob. 5PQCh. 1.3 - Prob. 6PQCh. 1.3 - Prob. 1EPQCh. 1.3 - Prob. 2EPQCh. 1.3 - Prob. 3EPQCh. 1.3 - Prob. 4EPQCh. 1.3 - Prob. 5EPQCh. 1.3 - Prob. 6EPQCh. 1.3 - Prob. 1AHCh. 1.3 - Prob. 2AHCh. 1.3 - Prob. 3AHCh. 1.3 - Prob. 4AHCh. 1.3 - Prob. 5AHCh. 1.3 - Prob. 6AHCh. 1.3 - Prob. 7AHCh. 1.3 - Prob. 8AHCh. 1.3 - Prob. 9AHCh. 1.3 - Prob. 10AHCh. 1.3 - Prob. 11AHCh. 1.3 - Prob. 12AHCh. 1.3 - Ben Krenshaw’s supervisor at the construction site...Ch. 1 - Prob. 1ECPCh. 1 - Prob. 2ECPCh. 1 - Prob. 3ECPCh. 1 - Prob. 4ECPCh. 1 - Prob. 5ECPCh. 1 - Add the following: LU 1-2(1)
Ch. 1 - Prob. 7ECPCh. 1 - Prob. 8ECPCh. 1 - Prob. 9ECPCh. 1 - Prob. 10ECPCh. 1 - Prob. 11ECPCh. 1 - Prob. 12ECPCh. 1 - Prob. 13ECPCh. 1 - Multiply the following: LU 1-3(1)
Ch. 1 - Prob. 15ECPCh. 1 - Multiply the following: LU 1-3(1)
Ch. 1 - Multiply the following: LU 1-3(1)
Ch. 1 - Prob. 18ECPCh. 1 - Prob. 19ECPCh. 1 - Prob. 20ECPCh. 1 - Prob. 21ECPCh. 1 - Prob. 22ECPCh. 1 - Prob. 23ECPCh. 1 - Prob. 24ECPCh. 1 - Prob. 25ECPCh. 1 - Prob. 26ECPCh. 1 - Prob. 27ECPCh. 1 - Prob. 28ECPCh. 1 - Add the following and check by totaling each...Ch. 1 - Prob. 30ECPCh. 1 - Prob. 31ECPCh. 1 - Prob. 32ECPCh. 1 - Prob. 33ECPCh. 1 - Prob. 34ECPCh. 1 - Prob. 35ECPCh. 1 - Prob. 36ECPCh. 1 - Prob. 37ECPCh. 1 - Prob. 38ECPCh. 1 - Prob. 39ECPCh. 1 - Prob. 40ECPCh. 1 - Prob. 41ECPCh. 1 - Prob. 42ECPCh. 1 - Prob. 43ECPCh. 1 - Prob. 44ECPCh. 1 - Prob. 45ECPCh. 1 - Prob. 46ECPCh. 1 - Prob. 47ECPCh. 1 - Prob. 48ECPCh. 1 - Prob. 49ECPCh. 1 - Prob. 50ECPCh. 1 - Prob. 51ECPCh. 1 - Prob. 52ECPCh. 1 - Prob. 53ECPCh. 1 - Yahoo! Health reported in November 2014 that 6 out...Ch. 1 - Prob. 55ECPCh. 1 - Prob. 56ECPCh. 1 - Prob. 57ECPCh. 1 - Ron Alf, owner of Alf’s Moving Company, bought a...Ch. 1 - Prob. 59ECPCh. 1 - Prob. 60ECPCh. 1 - Prob. 61ECPCh. 1 - Prob. 62ECPCh. 1 - Prob. 63ECPCh. 1 - Prob. 64ECPCh. 1 - Prob. 65ECPCh. 1 - Prob. 66ECPCh. 1 - Roger Company produces beach balls and operates...Ch. 1 - Prob. 68ECPCh. 1 - Prob. 69ECPCh. 1 - Prob. 70ECPCh. 1 - Prob. 71ECPCh. 1 - Prob. 72ECPCh. 1 - Prob. 73ECPCh. 1 - Prob. 74ECPCh. 1 - Prob. 75ECPCh. 1 - Paula Sanchez is trying to determine her 2015...Ch. 1 - Prob. 1PTCh. 1 - Express the following number in verbal...Ch. 1 - Round the following numbers. LU 1-1(2)
Ch. 1 - Prob. 4PTCh. 1 - Prob. 5PTCh. 1 - Prob. 6PTCh. 1 - Prob. 7PTCh. 1 - Divide the following by the shortcut method. LU...Ch. 1 - Prob. 9PTCh. 1 - Sam Song plans to buy a $16,000 Ford Focus with an...Ch. 1 - Lester Hal has the oil tank at his business filled...
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- 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
- 8.6.4 Consider the test on the compressive strength of concrete described in Exercise 8.2.9. Compute a 90% prediction interval on the next specimen of concrete tested. 8.6.5 . SS 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_forwardAnswer questions 8S10 and 8S11 respectively.arrow_forward8.4.6 Information on a packet of seeds claims that 93% of them will germinate. Of the 200 seeds that were planted, only 180 germinated. a. Find a 95% confidence interval for the true proportion of seeds that germinate based on this sample. b. Does this seem to provide evidence that the claim is wrong? 8.6.1 Consider the tire-testing data described in Exercise 8.2.3. Compute a 95% prediction interval on the life of the next tire of this type tested under conditions that are similar to those employed in the original test. Compare the length of the prediction interval with the length of the 95% CI on the population mean.arrow_forward
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