Use the Following to Answer the Question(s) Below

Multiple Choice

Use the following to answer the question(s) below.
IT staff for a large corporation has developed the following probability distribution for the number of calls requiring troubleshooting problems per day.

-After computing a confidence interval, the investigator believes that the results are meaningless because the width of the interval is too large. In reconstructing the interval, the investigator should

A) decrease the sample size.
B) increase the level of confidence.
C) increase the sample size.
D) reduce the population variance.
E) increase the margin of error.