a professor gives a statistic exam. the exam has 50 possible points. the scores

Question

a professor gives a statistic exam. the exam has 50 possible points. the scores for the students in the third classeromm are as follows: 40 50 34 C ng.cengage.com/static/nb/ui/index.htmi?nbld 6276378nbNodeld-230968 MINDTAP From Cengage Week 2 Homework Due Tomorrow at 1 AM BRT Back to Assignment Keep the Highest: /4 Attempts: 7. Calculating the mean when adding or subtracting a constant A professor gives a statistics exam. The exam has 50 possible points. The scores for the students classroom are as follows: 40 50 34 28 40 32 24 44 38 Calculate the sample size, n, and the sample mean, M M= While grading the exam, the professor realizes that one of the questions covered material that wa in the lectures. This question was worth 6 points, so she decides to add 6 points to everyone's sco Calculate the new n and M. Player Learning except as noted. All rights reserved Grade It Now

Explanation / Answer

7) Here the scores of students are given as below:
40,50,34,28,40,32,24,44,38

So we can see that there are 9 scores of 9 students so sample size = n = 9
sample mean = M = (40+50+34+28+40+32+24+44+38)/9 = 36.6667

Now we need to add a score of 6 to each score. So the updated scores are as below:
46,56,40,34,46,38,30,50,44

sample size remains the same = n = 9
sample mean = M = (46+56+40+34+46+38+30+50+44)/9 = 42.6667

So sample mean increases by 6.

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