Question

Your class has just taken their first examination for this course. A sample of 11 scores out of the 15 students enrolled in this class shows the following in percentages: 80, 40, 90, 30, 50, 80, 60, 20, 45, 75, and 95?

(a)Based on the information above, how well do you think your entire class performed in this examination? Justify your answer.

(b)Can you also estimate a possible percentage range of your own exam scores if they were not among these 11 sampled? Also justify your answer.

Answer 1

(a)Based on the information above, how well do you think your entire class performed in this examination? Justify your answer.

The average score is 60.455 which means that the entire class performed quite okay in this examination.

(b)Can you also estimate a possible percentage range of your own exam scores if they were not among these 11 sampled? Also justify your answer.

The 95% confidence interval for the scores is between 43.495 and 77.414. The possible percentage range of your own exam scores if they were not among these 11 sampled is between 43.495 and 77.414.

60.455	mean Data
25.244	std. dev.
7.611	std. error
11	n
10	df
43.495	confidence interval 95.% lower
77.414	confidence interval 95.% upper
16.959	margin of error