Use the Following to Answer Questions

question 42

Short Answer

Use the following to answer questions :
A sample of 20 from a population produced a mean of 66.0 and a standard deviation of 10.0.A sample of 25 from another population produced a mean of 58.6 and a standard deviation of 13.0.Assume that the two populations are normally distributed and the standard deviations of the two populations are equal.
The null hypothesis is that the two population means are equal,while the alternative hypothesis is that the two population means are different.The significance level is 5%.
-What is the pooled standard deviation of the two samples,rounded to three decimal places?

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Definitions:

Poverty Rate

The percentage of the population that lives below the national poverty line, reflecting the portion of the community considered to be living in financial hardship.

Charles Murray

An American political scientist and author known for his works on intelligence and social policy.

Incentive To Work

Factors or motivations that encourage individuals to participate in the labor force or increase their level of effort in their jobs.

Poverty

A condition where individuals or groups lack the financial resources to meet basic living needs, such as food, shelter, and healthcare.