A sample of 23 information system managers had an average hourly income of $40.75 with a...
A sample of 23 information system managers had an average hourly income of $40.75 with a standard deviation of $7.00.
Develop a 95% confidence interval estimate for the average hourly wage of all information system managers.
a. Critical value for the confidence interval =
b. At 95% confidence, what is the margin of error
c. upper and lower limit
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A sample of 23 information system managers had an average hourly
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A sample of 100 information systems managers had an average hourly income of $40.00 with a standard deviation of $8.00. The value of the margin of error at 95% confidence is a. 1.568. b. 8. C. 80. d. .10.
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find a. the 95% confidence interval has s lower limit of $____
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find b. what is the margin of error for this interval?
8.2. TU-1 Question Help Hor The average selling price of a smartphone purchased by a random sample of 31 customers was $299. Assume the population standard deviation was $32 a. Construct a 95% confidence interval to estimate the average selling price in the population with this sample. b. What is the...
An SRS of 55 lawyers from Reno, Nevada had a mean hourly salary of x= $310 and standard deviation s- $75 a. construct a 95% confidence interval for the mean hourly salary of all Reno lawyers b.find the margin of error in part a c. how large a sample would be necessary to have a margin of error of $25 with a 95% confidence level?
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