Question 1
In a controlled laboratory environment, a random sample of 10 adults and a random sample of 10 children were tested by a psychologist to determine the room temperature that each person finds most comfortable. The data are summarized below:
Find the standard error of the estimate for the difference in mean comfortable room temperatures between adults and children.
◦ 0.1871
◦ 0.7000
◦ 1.6279
◦ 0.8367
Question 2
Consider the following set of salary data:
What assumptions are necessary to perform a test for the difference in population means?
◦ Both of the target populations have approximately normal distributions.
◦ The two samples were independently selected from the populations of men and women.
◦ The population variances of salaries for men and women are equal.
◦ All of the above are necessary.
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