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Solve the problem.Which of the following is not a condition that must be checked before proceeding with a two-sample test?

Solve the problem.A research firm carried out a hypothesis test on a population proportion using a right-tailed alternative hypothesis. Which of the following z-scores would be associated with a p-value of 0.04? Round to the nearest hundredth.

Solve the problem.Which statement best describes the significance level of a hypothesis test?

Solve the problem.A research firm carried out a hypothesis test on a population proportion using a left-tailed alternative hypothesis. Which of the following z-scores would be associated with a p-value of 0.04? Round to the nearest hundredth.

Use the empirical rule to solve the problem.At one college, GPA’s are normally distributed with a mean of 3.1 and a standard deviation of 0.4. What percentage of students at the college have a GPA between 2.7 and 3.5?

A random sample of car buyers was asked to respond to a survey about what was the most important quality of the car they purchased. This question is summarized in the table below. The important contributors were fuel efficiency, looks, manufacturer reputation, price or other.If one car buyer is randomly chosen from the group, what is the probability that the buyer is female?

Solve the problem.Which of the following statements is true about the confidence interval for a population proportion?

Use the following information to answer the question. In a recent poll of 1200 randomly selected adult office workers, 32% said they had worn a Halloween costume to the office at least once.What is the margin of error, using a 95% confidence level, for estimating the true population proportion of adult office workers who have worn a Halloween costume to the office at least once? (Round to the nearest thousandth)

What is stratified random sampling?

Should the company adopt the “$2 discount” as a policy for new users? Choose an answer which is true and logical.