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In a Washington Post/Kaiser Family Foundation Poll conducted from January through March 2015, 20% of women (ages 1726) who attended college during the past 4
- In a Washington Post/Kaiser Family Foundation Poll conducted from January through March 2015, 20% of women (ages 1726) who attended college during the past 4 years say they were sexually assaulted. The poll surveyed 514 randomly selected females.Use the result from the poll to estimate the proportion of women (ages 1726) who attended collegeduring the past 4 years and say they were sexually assaulted using a 90% confidence interval.
- Check the normality condition.
- State the confidence interval.
- Interpret the confidence interval.
- The trustees of a local school district commission a survey to determine voter opinions about a possible bond measure to fund school upgrades. In a poll of 293 random district registered voters, 178 would support the bond measure.In order for the bond measure to pass, the proportion of voters who support measure has to be greater than 55%.Conduct a hypothesis test to determine if the sample data provide enough evidence to conclude that such a bond would pass or that more than 55% of all district registered voters would support the bond. Use a 5% significance level to make your decision
- Check the normality condition.
- State the null and alternative hypothesis.
- State the P-value.
- State your conclusion.
- According to studies done in the 1940s, 29% of people dream in color.Suppose a researcher wanted to check whether this proportion has changed and draws a random sample of 200 people.Suppose that the researcher finds that 32% of the people in the sample reported dreaming in color.Assume all the conditions are met for a hypothesis test.At the 5% significance level, use the researcher's sample data summary to test the claim that the proportion of people who dream in color has changed from 29%.
- State the null and alternative hypothesis.
- State the P-value.
- State your conclusion.
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