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. Suppose you were to remove the second observation (value = 100),would a t procedure be appropriate for these data?
A)No,the data set would be too small.
B)No,you cannot remove data.
C)Yes,the assumptions would be reasonably met.
D)Yes,smaller data sets are better for t procedures.

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.  Suppose you were to remove the second observation (value = 100),would a t procedure be appropriate for these data?
A)No,the data set would be too small. 
B)No,you cannot remove data. 
C)Yes,the assumptions would be reasonably met. 
D)Yes,smaller data sets are better for t procedures.

Quizplus · Accepted Answer

The removal of an outlier (second observation) does not affect the appropriateness of using a t procedure as long as the assumptions for the procedure are still reasonably met. The sample size is still sufficiently large (n=10) and there is no indication of non-normality, unequal variances, or dependence in the data. Therefore, a t procedure would still be appropriate for these data.

You Are Interested in Determining If the Average Amount of Time