Teachers' Salaries in Connecticut The average teacher's salary inConnecticut (ranked first among states) is s$57,337. Suppose that the distributionof salaries is normal with a standard deviation of $7500. Round intermediate :value calculations to two decimal places and the final answers to at least fourdecimal places.Part: 0/ 2Part 1 of 2(a) What is the probability that a randomly selected teacher makes less than$46,100 per year?P(X<46,100) =

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Automobile Workers A worker in the automobile industry works an average of 42.7 hours per week. If the distribution is approximately normal with a standard deviation of 1.9 hours, what is the probability that a randomly selected automobile worker works less than 40 hours per week? Use a TI-83 Plus/TI-84 Plus calculator. Round the answer to at least four decimal places. P(X<40) =
Coffee: The National Coffee Association reported that 65% of U.S. adults drink coffee daily. A random sample of 300 U.S. adults is selected. Round your answers to at least four decimal places as needed. Part 1 of 6 (a) Find the mean . is 0.6500 The mean Alternate Answer: p The mean Part: 1/6 Part 2 of 6 is 0.65. 15 (b) Find the standard deviation . The standard deviation d is Español 00
Automobile Workers A worker in the automobile industry works an average of 42.2 hours per week. If the distribution is approximately normal with a standard deviation of 1.4 hours, what is the probability that a randomly selected automobile worker works less than 40 hours per week? Use a TI-83 Plus/TI-84 Plus calculator. Round the answer to at least four decimal places. P(X<40) =
Taxes: The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $4700. The IRS plans to draw a sample of 1000 tax returns to study the effect of a new tax law. Part: 0 / 5 Part 1 of 5 (a) What is the probability that the sample mean tax is less than $800 ? Round the answer to at least four decimal places. The probability that the sample mean tax is less than $8000 is X
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High School Competency Test A mandatory competency test for high school sophomores has a normal distribution with a mean of 460 and a standard deviation of 114 . Round the final answers to the nearest whole number and intermediate z -value calculations to 2 decimal places. (a)The top 6% of students receive $500 . What is the minimum score you would need to receive this award? The minimum score needed to receive the award is .
Doctoral Student Salaries Full-time Ph.D. students receive an average of $12,837 per year. If the average salaries are normally distributed with a standard deviation of $1500, find the probabilities. Use a TI-83 Plus/TI-84 Plus calculator and round the answer to at least four decimal places. Part: 0/ 2 Part 1 of 2 (a) The student makes more than S15.750. P(X>15.750) = %3D
High School Competency Test A mandatory competency test for high school sophomores has a normal distribution with a mean of 380 and a standard deviation of 81. Round the final answers to the nearest whole number and intermediate z-value calculations to 2 decimal places. The top 4% of students receive $500, what is the minimum.co (b) The bottom 2% of students must go to summer school. What is the minimum score you would need to stay out of this group? The minimum score needed to stay out of this group is 0 X $
Ages of Proofreaders At a large publishing company, the mean age of proofreaders is 36.2 years and the standard deviation is 3.7 years. Assume the variable is normally distributed. Round intermediate z-value calculations to two decimal places and the final answers to at least four decimal places. Part 1 of 2 If a proofreader from the company is randomly selected, find the probability that his or her age will be between 36 and 37.5 years. P (36 < X < 37.5) = 0.1589 Part: 1 / 2 Part 2 of 2 G If a random sample of 22 proofreaders is selected, find the probability that the mean age of the proofreaders in the sample will be between 36 and 37.5 years. Assume that the sample is taken from a large population and the correction factor can be ignored. P (36 < X <37.5) = X

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