The high price of medicines is a source of major expense for those seniors in the United States who have to pay for these medicines themselves. A random sample of 1600 seniors who pay for their medicines showed that they spent an average of $4300 last year on medicines witha standard deviation of $500. Make a 90% confidence interval for the corresponding population mean. Round your answers to cents. %24 i to $

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The high price of medicines is a source of major expense for those seniors in the United States who have to pay for these medicines
themselves. A random sample of 1600 seniors who pay for their medicines showed that they spent an average of $4300 last year on
medicines with a standard deviation of $500. Make a 90% confidence interval for the corresponding population mean.
Round your answers to cents.
$ i
to $ i
Transcribed Image Text:The high price of medicines is a source of major expense for those seniors in the United States who have to pay for these medicines themselves. A random sample of 1600 seniors who pay for their medicines showed that they spent an average of $4300 last year on medicines with a standard deviation of $500. Make a 90% confidence interval for the corresponding population mean. Round your answers to cents. $ i to $ i
A random sample of n = 16 mid-sized cars tested for fuel consumption gave a mean of x = 20.01 miles per gallon with a standard
deviation of s = 2.84 miles per gallon.
%3D
Assuming that the miles per gallon given by all mid-sized cars have a normal distribution, find a 99% confidence interval for the
population mean, µ.
Round your answers to two decimal places.
i
<HS i
Transcribed Image Text:A random sample of n = 16 mid-sized cars tested for fuel consumption gave a mean of x = 20.01 miles per gallon with a standard deviation of s = 2.84 miles per gallon. %3D Assuming that the miles per gallon given by all mid-sized cars have a normal distribution, find a 99% confidence interval for the population mean, µ. Round your answers to two decimal places. i <HS i
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