Question

The technology committee at a college has stated that the average time spent by students per lab visit has increased, and the increase supports the need for increased lab fees. To substantiate this claim, the committee randomly samples 12 student lab visits and notes the amount of time spent using the computer. The times are given in the accompanying table. Complete parts (a) and (b) below. EClick the icon to view the table of lab times. a) Plot the data. Are any of the observations outliers? How does this affect inference? Choose the correct histogram below. i Table of lab times O B. O C. A. Time (min.) 64 58 56 51 80 9 160 160 75 77 Time (min. Time (min.) Time (min.) Are any of the observations outliers? How does this affect inference? Choose the corect answer below. Print The histogram shows 2 extreme outliers, so with the outliers included, the conditions for inference are satisfied. O B. The histogram shows 2 extreme outliers, so with the outliers included, the conditions for inference are violated. C. The histogram shows no extreme outliers, so the conditions for inference are violated. D. The histogram shows no extreme outliers, so the conditions for inference are satisfied. ) The previous mean amount witho time spent using the lab computer was 58 minutes. Find a 95% confidence interval for the true mean. Make a conclusion about the claim. If there are outliers, find intervals with and the outliers present. The 95% confidence interval including any outliers that may exist is minutes. (Round to one decimal place as needed.) The 95% confidence interval excluding any outliers that may exist is minutes. (Round to ane decimal place as needed.) Make a conclusion about the claim. OA. Because there are no outliers, the conditions for inference are met, and the confidence interval is entirely above 58 minutes, conclude that the new ses one to be cautious about conclusions from mean is above 58 minutes. small and the presence of two large outlier O B. inutes. The sample size new mean is above this samol one would be reluctant to conclude that t is above 58 minutes. case, one would be reluctant to conclude that the new mean is above 58 minutes. The sample size is large and the presence of two large outliers i O D. satisfled

Answer 1