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Listen 6 A bottler of drinking water fills plastic bottles with a mean volume of 993 milliliters (mL) and standard deviation of 8 mL. The fill volumes are normally distributed. What proportion of bottles have volumes between 991 ml and 997 ml? (In other words, what is the probability that a randomly selected bottle will have a volume between 991 ml and 997 ml?) 0.6563 12 0.2902 0.5328 15 0.3781 18 Question 12 (1 point) Listen The average commute time for a random sample of students who commute to campus at KSU is 23.4 minutes. The 90% confidence interval to estimate the mean commute time for the population of KSU students is (16.5, 30.3). Which of the following is the best interpretation for this 24 information? We are 90% confident that the mean commute time for the sample of commuter students is between 16.5 and 30.3 minutes. We are confident that 90% of the student population has a commute time around 23.4 minutes. We are 90% confident that the true population mean commute time for the commuter students at KSU is between 16.5 and 30.3 minutes. We are confident that 90% of the student population at KSU have a commute time between 16.5 and 30.3 minutes. Question 13 (1 point) Listen A production line manager wants to determine how well the production line is running. He randomly selected 90 items from the assembly line and found that 8 were defective. (Assume all conditions have been satisfied for building a confidence interval). Find the 95% confidence interval to estimate the population proportion of items that are defective. (0.0396, 0.1382) (0.0301, 0.1477) (0.0116, 0.1662) (0.0234, 0.1099) Question 14 (1 point) Listen A local politician claims that 55% of the community is in support of a proposed park expansion. The local newspaper conducts a study and obtains a 90% confidence interval of (0.4332, 0.6168). Which statement best reflects the conclusion that can be made about the claim from the politician? The confidence interval DOES NOT CONTRADICT the claim because 0.55 IS in the interval. The confidence interval DOES NOT CONTRADICT the claim because 0.55 IS NOT in the interval. The confidence interval CONTRADICTS the claim because 0.55 IS in the interval. The confidence interval CONTRADICTS the claim because 0.55 IS NOT in the interval, Question 15 (1 point) Listen According to a previous study, the average height of Kennesaw State University students was 68 inches in Fall 2005. We are curious about whether the average height of KSU students has changed since 2005. We measure the heights of 50 randomly selected students and find a sample mean of 69.1 inches and sample standard deviation of 3.5 inches. Conduct a hypothesis test at a significance level of 0.05 to determine if the height of KSU students has changed since 2005. What is the p value of the test? 0.0108 0.0309 0.0080 0.0263