Assignment: Chapter 10 Assignment

Exercise 10.05 Algorithmic.

The average expenditure on Valentine's Dav was expected to be $100.39 (USA Today, February 13, 2006]. Do male and female consumers differ in the amounts they spend? The average expenditure in a sample survey of 50 male consumers was $139.32, and the average expenditure in a sample survey of 33 femaie consumers was $61.64. Based on past surveys, the standard deviation for male consumers is assumed to be $34, and the standard deviation for female consumers is assumed to be $20. The 2 value is 2.576. Round your answers to 2 decimal places. a. What is the point estimate of the difference between the population mean expenditure for males and the population mean expenditure for females? b. At 99% confidence, what is the margin of error? e. Develop a 99% confidence interval for the difference between the two population means. on, e