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5. The DMV for a large city claims 80% of candidates pass their driving test. A...

5. The DMV for a large city claims 80% of candidates pass their driving test. A newspaper reporter did a survey of 90 randomly selected local teens who took their driving test and only 61 passed the test.

Write the null hypothesis and alternative hypothesis:

Find p-hat: Round to 3 decimal places

Use the formulas below to see if the CLT is satisfied:

n*pO

n(1 – pO)

Are the samples large enough?

Find the z-test statistic: Round z-test statistic to 2 decimal places        

Math   Statistics-And-Probability   
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