Consider EXAM-1 points out of 120 points. Suppose you wanted to estimate the ave

Question

Consider EXAM-1 points out of 120 points. Suppose you wanted to estimate the average of EXAM-1 score for the entire class and hence you wanted to collect 10 scores of your classmates (including your score). Say the collected scores from students taking class with you are as follows: 105, 91, 52, 116, 100, 95, 98, 109, 96, (YOUR SCORE HERE). Please include your EXAM-1 score to these 9 scores and make it a total count of 10 scores. Answer the following. my scoree is 73

1.Comparing mean and median of these ten scores, what is the approximate shape of the data?

a.Left Skewed

b.Right Skewed

c.Symmetric

d.Uniform

2. If we multiply every score given above with a constant 2, what happens to the sample variance of these new scores?

a.Does not change

b.Increases by a multiple of two

c.Increases by a multiple of four

d.Decreases by a multiple of half

3. If we add every score given above with a constant 2.5, what happens to the sample variance of these new scores?

a.Does not change

b.Increases by a total of 2.5

c.Increases by a total of five

d. Decreases by a total of 2.5

4. Is your EXAM-1 score beyond or below three standard deviations from the mean?

a.Yes

b.No

c.Maybe

Explanation / Answer

1 a)a.Left Skewed

2c.Increases by a multiple of four

3)a.Does not change

4)b.No

X 52 91 95 96 98 100 105 109 116 120 mean 98.2 median 99

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