A researcher obtained independent simple random samples of men and women between the ages of 20 and 29. She finds that 35 of 410 men and 59 of 398 women suffered from insomnia at least once a week during the past year. Are the requirements for inference with the two-proportions z-test satisfied? Explain your answer.

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The Answer is The requirements are satisfied. The samples are both simple random samples. The samples are independent of each other. There are at least 5 successes and at least 5 failures in each sample.

A Researcher Obtained Independent Simple Random Samples of Men and Women