A large international company with over 1.5 million employees wants to estimate how many of their employees have a cholesterol level that is higher than the recommended level. The company collects data from a random sample of employees and creates a 95% confidence interval for the population mean cholesterol level for all company employees. The upper bound of a 95% confidence interval for the population mean cholesterol level was 261.48, and the width of the same 95% confidence interval was 10.44. In this confidence interval, what is the sample mean (x bar) cholesterol level? Provide your answer as a number rounded to two decimal places
A large international company with over 1.5 million employees wants to estimate how many of their employees have a cholesterol level that is higher than the recommended level. The company collects data from a random sample of employees and creates a 95% confidence interval for the population mean cholesterol level for all company employees. The upper bound of a 95% confidence interval for the population mean cholesterol level was 261.48, and the width of the same 95% confidence interval was 10.44. In this confidence interval, what is the sample mean (x bar) cholesterol level? Provide your answer as a number rounded to two decimal places
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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![A large international company with over 1.5 million employees wants to estimate how many of their
employees have a cholesterol level that is higher than the recommended level. The company collects
data from a random sample of employees and creates a 95% confidence interval for the population
mean cholesterol level for all company employees.
The upper bound of a 95% confidence interval for the population mean cholesterol level was
261.48, and the width of the same 95% confidence interval was 10.44.
In this confidence interval, what is the sample mean (x bar) cholesterol level? Provide your answer as a
number rounded to two decimal places](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1ad9afb9-8240-447b-bb0e-3ff183c8eb2d%2Fb567b50d-7847-457d-9f74-293c8c825ad1%2Fe1lbh1_processed.png&w=3840&q=75)
Transcribed Image Text:A large international company with over 1.5 million employees wants to estimate how many of their
employees have a cholesterol level that is higher than the recommended level. The company collects
data from a random sample of employees and creates a 95% confidence interval for the population
mean cholesterol level for all company employees.
The upper bound of a 95% confidence interval for the population mean cholesterol level was
261.48, and the width of the same 95% confidence interval was 10.44.
In this confidence interval, what is the sample mean (x bar) cholesterol level? Provide your answer as a
number rounded to two decimal places
![Consider the following situation: Doctors recommend having a total cholesterol level below 200
mg/dl. A large local company wants to test if their employees have a mean cholesterol level that is
different from the recommended level. The company collects data from a random sample of 50
employees and finds that the mean cholesterol level of the employees in the sample is 256 mg/dl,
with a sample standard deviation of 54.5.
Which of the following hypothesis tests would be appropriate in this situation?
z-test for population proportion
O paired t-test
O two-samplet-test for population mean differences
O z-test for population mean
t-test for population mean](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1ad9afb9-8240-447b-bb0e-3ff183c8eb2d%2Fb567b50d-7847-457d-9f74-293c8c825ad1%2Fy5ejfkj_processed.png&w=3840&q=75)
Transcribed Image Text:Consider the following situation: Doctors recommend having a total cholesterol level below 200
mg/dl. A large local company wants to test if their employees have a mean cholesterol level that is
different from the recommended level. The company collects data from a random sample of 50
employees and finds that the mean cholesterol level of the employees in the sample is 256 mg/dl,
with a sample standard deviation of 54.5.
Which of the following hypothesis tests would be appropriate in this situation?
z-test for population proportion
O paired t-test
O two-samplet-test for population mean differences
O z-test for population mean
t-test for population mean
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