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The technology committee 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 in minutes are shown in the table to the right. Complete parts a and b. Time 134 74 53 10 71 51 70 60 62 52 68 54 70 140 70 140 70 140 Time spent in lab Time spent in lab Time spent in lab Are any of the observations outliers? Explain. O A. The histogram shows that there are no outliers. The conditions for inference are satisfied. O B. The histogram shows that there is one extreme outlier. Since the sample size is large enough, the conditions for inference are okay. C. The histogram shows two extreme outliers. With these values included, the conditions for inference are violated. b) The previous mean amount of time spent using the lab computer was 54 minutes. Find a 90% confidence interval for the true mean. What do you conclude about the claim? If there are outliers, find intervals with and without the outlie present. Find the confidence interval using all of the data. The confidence interval is ( D

The technology committee 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 in minutes are shown in the table to the right. Complete parts a and b. Time 134 74 53 10 71 51 70 60 62 52 68 54 70 140 70 140 70 140 Time spent in lab Time spent in lab Time spent in lab Are any of the observations outliers? Explain. O A. The histogram shows that there are no outliers. The conditions for inference are satisfied. O B. The histogram shows that there is one extreme outlier. Since the sample size is large enough, the conditions for inference are okay. C. The histogram shows two extreme outliers. With these values included, the conditions for inference are violated. b) The previous mean amount of time spent using the lab computer was 54 minutes. Find a 90% confidence interval for the true mean. What do you conclude about the claim? If there are outliers, find intervals with and without the outlie present. Find the confidence interval using all of the data. The confidence interval is ( D

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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The technology committee 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 in minutes are shown in the table to the right. Complete parts a and b. Time 74 134 53 10 71 51 70 60 62 52 68 54 140 70 140 70 140 Time spent in lab Time spent in lab Time spent in lab Are any of the observations outliers? Explain. O A. The histogram shows that there are no outliers. The conditions for inference are satisfied. O B. The histogram shows that there is one extreme outlier. Since the sample size is large enough, the conditions for inference are okay. O c. The histogram shows two extreme outliers. With these values included, the conditions for inference are violated. b) The previous mean amount of time spent using the lab computer was 54 minutes. Find a 90% confidence interval for the true mean. What do you conclude about the claim? present. there are outliers, find intervals with and without the outliers Find the confidence interval using all of the data. The confidence interval is (OD. (Round to two decimal places as needed.) # of Visits
Transcribed Image Text:The technology committee 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 in minutes are shown in the table to the right. Complete parts a and b. Time 74 134 53 10 71 51 70 60 62 52 68 54 140 70 140 70 140 Time spent in lab Time spent in lab Time spent in lab Are any of the observations outliers? Explain. O A. The histogram shows that there are no outliers. The conditions for inference are satisfied. O B. The histogram shows that there is one extreme outlier. Since the sample size is large enough, the conditions for inference are okay. O c. The histogram shows two extreme outliers. With these values included, the conditions for inference are violated. b) The previous mean amount of time spent using the lab computer was 54 minutes. Find a 90% confidence interval for the true mean. What do you conclude about the claim? present. there are outliers, find intervals with and without the outliers Find the confidence interval using all of the data. The confidence interval is (OD. (Round to two decimal places as needed.) # of Visits
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