You are interested in determining if the average amount of time (in hours)that students spend on the Internet per day is greater than 2 hours.The data below are from a random sample of 11 students. What did you notice from your preliminary analysis of the data?
A)The data were not approximately normal.
B)There are outliers.
C)The data are normal.
D)A and B are both correct.

Question

You are interested in determining if the average amount of time (in hours)that students spend on the Internet per day is greater than 2 hours.The data below are from a random sample of 11 students.  What did you notice from your preliminary analysis of the data?
A)The data were not approximately normal. 
B)There are outliers. 
C)The data are normal. 
D)A and B are both correct.

Quizplus · Accepted Answer

From the data, we can see that there are some extreme values (such as 6.7 and 10.2) that are far from the rest of the data. These values suggest the presence of outliers. Also, when we constructed a histogram of the data, it appeared to be skewed to the right, indicating a non-normal distribution. Therefore, both A and B are correct.

You Are Interested in Determining If the Average Amount of Time