Population mean expenditure for males

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Reference no: EM131031779

Problem: The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006). Do male and female consumers differ in the amounts they spend? The average expenditure in a sample survey of 44 male consumers was $135.67, and the average expenditure in a sample survey of 34 female consumers was $68.64. Based on past surveys, the standard deviation for male consumers is assumed to be $39, and the standard deviation for female consumers is assumed to be $24

Requirement:

i) What is the point estimate of the difference between the population mean expenditure for males and the population mean expenditure for females (to 2 decimals)?

ii) At 99% confidence, what is the margin of error (to 2 decimals)?

iii) Develop a 99% confidence interval for the difference between the two population means (to 2 decimals).

Reference no: EM131031779

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