Unit 6 Review

Test the Null Hypothesis p=0.27

• 1 Proportion Z Interval

• 1 Proportion Z Test

• 2 Proportion Z Interval

• 2 Proportion Z Test

Estimate the population proportion from a sample

• 1 Proportion Z Interval

• 1 Proportion Z Test

• 2 Proportion Z Interval

• 2 Proportion Z Test

Estimate a difference in population proportions from two samples

• 1 Proportion Z Interval

• 1 Proportion Z Test

• 2 Proportion Z Interval

• 2 Proportion Z Test

Test a claim about a difference in population proportions from two samples

• 1 Proportion Z Interval

• 1 Proportion Z Test

• 2 Proportion Z Interval

• 2 Proportion Z Test

Null Hypothesis: The carriages pull themselves

• Type I

• Type II

A survey was conducted to determine what percentage of college juniors and seniors would have chosen to attend a different college if they had known then what they know now. In a random sample of 100 juniors, 34 percent indicated that they would have attended a different college. In another random sample of 120 seniors, 40% said they would have attended a different college. Is there enough evidence to show that more juniors than seniors wish they had attended a different college?

• 1 Proportion Z Interval

• 1 Proportion Z Test

• 2 Proportion Z Interval

• 2 Proportion Z Test

Null Hypothesis: Jeff Bezos is a normal person

• Type I

• Type II

In 2012, the American Journal of Clinical Nutrition reported that 31% of Australian adults over age 25 have a vitamin D deficiency. The data came from the AusDiab study of 11,218 Australians. Create a 95% confidence interval.

• 1 Proportion Z Interval

• 1 Proportion Z Test

• 2 Proportion Z Interval

• 2 Proportion Z Test

Null Hypothesis: It's just a normal day

• Type I

• Type II

In 1999, researchers at the Centers for Disease Control and Prevention estimated that about 34.8% of high school students smoked cigarettes. They established a national health goal of reducing that figure to 16% by the year 2010. To that end, they would be on track if they achieved a reduction to 17.7% by 2009. In 2009, they released a research study in which 19.5% of a random sample of 5080 high school students said they were current smokers. Is this evidence that progress toward the goal was off track? 

• 1 Proportion Z Interval

• 1 Proportion Z Test

• 2 Proportion Z Interval

• 2 Proportion Z Test