Hoping to lure more shoppers downtown, a city builds a new public parking garage in the central business district. The city plans to pay for the structure through parking fees. For a random sample of 42 weekdays, the fees collected each weekday averaged $131, with standard deviation of $16. Complete parts a through e below. a) What assumptions must you make in order to use these statistics for inference? Select all that apply. A. The distribution is unimodal and symmetric with no outliers. B. The sample size is at least 10% of the population. C. The data are a random sample of all weekdays. D. The data values should be dependent. b) Find a 90% confidence interval for the mean income this parking garage will generate for each weekday The 90% confidence interval for the mean income the parking garage will generate for each weekday is ($$ (Round to two decimal places as needed. Use ascending order) c) Interpret this confidence interval in context. Select the correct choice below.
Hoping to lure more shoppers downtown, a city builds a new public parking garage in the central business district. The city plans to pay for the structure through parking fees. For a random sample of 42 weekdays, the fees collected each weekday averaged $131, with standard deviation of $16. Complete parts a through e below. a) What assumptions must you make in order to use these statistics for inference? Select all that apply. A. The distribution is unimodal and symmetric with no outliers. B. The sample size is at least 10% of the population. C. The data are a random sample of all weekdays. D. The data values should be dependent. b) Find a 90% confidence interval for the mean income this parking garage will generate for each weekday The 90% confidence interval for the mean income the parking garage will generate for each weekday is ($$ (Round to two decimal places as needed. Use ascending order) c) Interpret this confidence interval in context. Select the correct choice below.
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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Transcribed Image Text:Hoping to lure more shoppers downtown, a city builds a new public parking garage in the central business district. The city plans to pay for the structure through parking fees. For a random sample of 42 weekdays,
the fees collected each weekday averaged $131, with standard deviation of $16. Complete parts a through e below.
a) What assumptions must you make in order to use these statistics for inference?
Select all that apply.
A. The distribution is unimodal and symmetric with no outliers.
B. The sample size is at least 10% of the population.
C. The data are a random sample of all weekdays.
4
D. The data values should be dependent.
b) Find a 90% confidence interval for the mean income this parking garage will generate for each weekday.
The 90% confidence interval for the mean income the parking garage will generate for each weekday is ($.$.
(Round to two decimal places as needed. Use ascending order.)
c) Interpret this confidence interval in context.
Select the correct choice below.
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Transcribed Image Text:Hoping to lure more shoppers downtown, a city builds a new public parking garage in the central business district. The city plans to pay for the structure through parking fees. For a random sample of 42
c) Interpret this confidence interval in context.
Select the correct choice below.
OA. There is 90% confidence that the daily income for a weekday falls in the interval.
OB. There is 90% confidence that the interval contains the mean income for each weekday.
OC. There is 90% confidence that the daily income for all weekdays falls in the interval
OD. There is 90% confidence that the mean income for each weekday will always fall in the interval.
d) Explain what "90% confidence" means in this context.
Select the correct choice below.
OA. 90% of all weekdays sampled have daily incomes that fall in the interval.
OB. 90% of all weekdays have daily incomes that fall in the interval.
OC. 90% of all samples of size 42 produce intervals that contain the mean income for each weekday.
O D. 90% of all samples of size 42 have a mean income for each weekday that is in the interval.
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