What are the values for the following variables? •x= •s= •n= • (degrees of freedom) df = B)What is the critical value, Tc corresponding to a 90% confidence level? C)Compute the margin of error, D) write out a 90% confidence interval about |u

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a) What are the values for the following variables? •x= •s= •n= • (degrees of freedom) df = B)What is the critical value, Tc corresponding to a 90% confidence level? C)Compute the margin of error, D) write out a 90% confidence interval about |u
How long is your commute to school? For a random sample 16 LaGuardia
students, the mean commute time was 33 minutes. The standard deviation for the
sample was 10 minutes. Answer the questions below to construct a 90% confidence
interval about the population mean, u. Assume that student commute times are nor-
mally distributed.
Transcribed Image Text:How long is your commute to school? For a random sample 16 LaGuardia students, the mean commute time was 33 minutes. The standard deviation for the sample was 10 minutes. Answer the questions below to construct a 90% confidence interval about the population mean, u. Assume that student commute times are nor- mally distributed.
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