Question #14279

According to a recent report in Namibia Today on 13 February 2006, the average expenditure on Valentine's day was expected to be about N$101. Do male and female consumers differ in the amounts they spend? The average expenditure in a sample survey of 40 male consumers was N$135.67, and the average expenditure in a sample survey of 30 female consumers was N$68.64. Based on past surveys, the standard deviation for male consumers is assumed to be N$35, and the standard deviation for female consumers is assumed to be N$20.

1.1) What is the point estimate of the difference between the population mean expenditure fo males and and the population mean expenditure for females?

1.2) Test a claim which states that males and females differ in the amounts they spend

1.3) Construct and interpret a 99 percent confidence intervals for the difference between the two population means.

1.1) What is the point estimate of the difference between the population mean expenditure fo males and and the population mean expenditure for females?

1.2) Test a claim which states that males and females differ in the amounts they spend

1.3) Construct and interpret a 99 percent confidence intervals for the difference between the two population means.

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