2. Collette is self-employed, selling items at Home Interior parties. She wants to estimate the average amount a client spends at each party. A random sample of 35 clients' receipts gave a sample mean of $34.70 and historically we know the population standard deviation of spending at these parties to be $4.85. a. Explain why you may assume your data is normally distributed. b. Find a 90% confidence interval for the average amount expected to be spent by a given client at a party. c. Write a brief explanation of the meaning of the confidence interval in the context of this problem
2. Collette is self-employed, selling items at Home Interior parties. She wants to estimate the average amount a client spends at each party. A random sample of 35 clients' receipts gave a sample mean of $34.70 and historically we know the population standard deviation of spending at these parties to be $4.85. a. Explain why you may assume your data is normally distributed. b. Find a 90% confidence interval for the average amount expected to be spent by a given client at a party. c. Write a brief explanation of the meaning of the confidence interval in the context of this problem
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 25SGR
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