1). A research company took a sample of 60 textbooks and collected information on their prices.The information was found to be normally distributed with a mean of $238 per textbook and a standard deviation of $45 for the sample.

Using a confidence level of 95%, complete the following steps to determine the confidence interval for the mean price of all such college textbooks.(All areas are reported to four decimal places; all z-scores are reported to two decimal places except the two special cases listed at the bottom of the table.)

Insert the following values from the question:

x= $ _____

= $ _____

n = ______

CL =______ %

What area does the confidence level represent?__________

Calculate the following values:

=__________

/2 =__________

z/2=_________ (use the positive value, even if you calculate a negative answer)

Use the appropriate formula to calculate the error to two decimal places: $ __________

What are the minimum and maximum values of the confidence interval? (two decimals)

Min: $ __________

Max: $ __________