Mathematics, 10.05.2021 18:00 sofiaarmy12
William is a waiter at Seventh Heaven Hamburgers. He wants to estimate the mean amount each group at a table leaves for a tip. A random sample of 36 tables has mean x with bar on top space equals space $ 9.30. Assume σ is known to be $3.88. Answer the following questions to create a 90% confidence interval for µ, the mean amount of all group tips.
A. Find the critical value (just enter the number):
B. Compute the maximal margin of error. Do not use the dollar symbol ($). Just enter the number, rounded to two decimal places:
C. Give the 90% confidence interval. Use bracket symbols like we did in class. Do not use dollar symbols ($). Write the smaller number first, the larger number second, separated by a comma:
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