Question 5 Students in a statistics class conduct a survey to estimate the mean Select one answer. number of units students at their college are enrolled in. The 5 points students took a random sample of 50 students from their college. The students calculated a 90% confidence interval to estimate the mean number of units students at their college are enrolled in. The confidence interval was too wide to provide a precise estimate. The students are strategizing about how to produce a narrower confidence interval. True or false? The students could produce a narrower confidence interval by increasing the confidence level to 95%. A. . True B. False Question 6 Students in a statistics class conduct a survey to estimate the mean Select one answer. number of units students at their college are enrolled in. The 5 points students took a random sample of 50 students from their college. The students calculated a 90% confidence interval to estimate the mean number of units students at their college are enrolled in. The confidence interval was too wide to provide a precise estimate. The students are strategizing about how to produce a narrower confidence interval. True or false? The students could produce a narrower confidence interval by increasing the sample size to 100. A. True B. False Question 7 Suppose we take two different random samples from the same Select one answer. population of test scores. The population mean and standard 10 points deviation are unknown. The first sample has 25 data values. The second sample has 64 data values. Then we construct a 95% confidence interval for each sample to estimate the population mean. Which confidence interval will have greater precision (smaller width) for estimating the population mean? A. . The confidence interval based on the sample of 64 data values will be more precise. B. Both confidence intervals will have the same precision. C. The confidence interval based on the sample of 25 data values will be more precise. Question 8 Suppose we take a random sample of 41 state college students. Then Fill in the blanks we measure the length of their right foot in centimeters. We compute by selecting one a 95% confidence interval for the mean foot length for students at option from each this college. We get (21.71, 25.09). menu. 10 points Suppose that we now compute a 90% confidence interval. As confidence level decreases, the interval width (