An economist wants to estimate the mean per capitaincome (in thousands of dollars) for a major city inCalifornia. He believes that the mean income is $28.4,and the standard deviation is known to be $6.6. Howlarge of a sample would be required in order toestimate the mean per capita income at the 90% level ofconfidence with an error of at most $0.56? Round youranswer up to the next integer.

From the provided information,Confidence level = 90%Margin of error (E) = 0.56

Answered: An economist wants to estimate the mean…

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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Similar questions

It is often quoted that in a normal distribution, 95% of the data lies 1.96 deviations either side of the mean. How many deviations from the mean would 88 percent lie?
An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California. He believes that the mean income is $⁢28.4, and the standard deviation is known to be $⁢6.6. How large of a sample would be required in order to estimate the mean per capita income at the 85% level of confidence with an error of at most $⁢0.56? Round your answer up to the next integer.
AFTER ENTERING TEST SCORES FROM HER STATISTICS CLASS, THE INSTRUCTOR CALCULATES THE MEAN AND THE MEDIAN AND FINDS THAT THE MEAN IS SIGNIFICANTLY SMALLER THAN THE MEDIAN? WHAT MIGHT THIS IMPLY ABOUT THE SHAPE OF THE DISTRIBUTION OF HER STUDENTS' TEST SCORES?
Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?
Suppose you have already calculated the mean, the average deviation, and the standard deviation of the weights in pounds of 20 third-graders. a. if these weights were converted to kilograms and the mean and the average deviation were once again calculated, would the second average deviation be (numerically) less than, greater than, or equal to the first average deviation? Explain your answer. b. If the standard deviation of these weights were calculated in kilograms, would it be (numerically) less than, greater than, or equal to the first standard deviation? Explain your answer
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
Suppose that the weight of male babies less than 2 months old is normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. What proportion of babies weigh less than 9.20 pounds?Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage.
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An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. He believes that the mean income is $20.8$, and the standard deviation is known to be $⁢9.9. How large of a sample would be required in order to estimate the mean per capita income at the 99% level of confidence with an error of at most $⁢0.62? Round your answer up to the next integer.
An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. He believes that the mean income is $20.7, and the variance is known to be $40.96. How large of a sample would be required in order to estimate the mean per capita income at the 95% level of confidence with an error of at most $0.46? Round your answer up to the next integer.
A university dean wishes to estimate the average number of hours his part-time instructors teach per week. The standard deviation from the previous study is 2.6 hours. How large a sample must be selected if he wants to be 99% confident of finding whether the true mean differs from the sample mean by 1 hour? 20 45 44 19 What is the margin of error? minutes

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