Zoe is testing to see if UCI students are more stressed out than the normal person...

Zoe is testing to see if UCI students are more stressed out than the normal
person is. The mean stress level of the average person is 50 with a known
standard deviation of 10. Amy is going a two-tailed test with α = .10. The null
hypothesis is μ = 50. What precisely is μ the mean of?

The average UCI student commutes 6.3 miles to school, with a known standard
deviation of five miles. Amy believes that social science majors are different from
the average UCI student. She gets a sample of six social science majors and
asks them how far they commute. They answer 4, 13, 11, 7, 15, 10. Do a z-test
to see if Amy’s belief is true. Please calculate the z-statistic for this data.

Now, for the above question, state the critical value, and come to a conclusion
about Amy’s belief. Let α = .01. Make it a two-tailed test.

What is the p-value for the experiment in questions 13 and 14? Answer to
four digits past the decimal point, such as .3264.

Solutions

Expert Solution

orchestra answered 1 year ago

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