A survey of 47 randomly selected iPhone owners showed that the purchase price has a mean of $660 with a sample standard deviation of $25. (Use t...
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A survey of 47 randomly selected iPhone owners showed that the purchase price has a mean of $660 with a sample

standard deviation of $25. (Use t Distribution Table. https://ezto-cf-media.mheducation.com/Media/Connect_Production/bne/Lind_9e/chapter_09/students_t_dist_table.jpg)

 

1. Compute the standard error of the sample mean. (Round your answer to 2 decimal places.)

Standard error:


2. Compute the 95% confidence interval for the mean. (Round your answers to 3 decimal places.

Confidence interval is between _____ and _____


3. To be 95% confident, how large a sample is needed to estimate the population mean within $8? (Round up your answer to the next whole number.)

Sample Size:

Top Answer

1) 3.65 2)... View the full answer

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