Intro Stats Help

Intro Stats Help.

I’m studying and need help with a Statistics question to help me learn.

Hello, please answer these 3 questions

1) Find the standard deviation for the given sample data. Round your answer to one more decimal place than is present in the original data.

The top nine scores on the organic chemistry midterm are as follows.
74, 39, 80, 57, 43, 69, 21, 34, 69

a) 21.9

b) 6.8

c) 19.4

d) 20.5

2) Solve the problem. Round monetary amounts to the nearest dollar.

Packages of a certain candy vary slightly in weight. Here are the measured weights of nine packages, in ounces:

a. Find the mean and the median of these weights.
b. Which, if any, of these weights would you consider to be an outlier?
c. What are the mean and median weights if the outlier is excluded?

<<see attachment for #2)

3) Use the empirical rule to solve the problem.

At one college, GPA’s have a distribution that is unimodal and symmetric with a mean of 2.9 and a standard deviation of 0.4. Is a GPA of 3.8 more than one standard deviation above the mean?

a) No

b) Yes

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