Question

I need two questions answered and explain how arrived at each answer:
1) Find the margin of

error for the given values of​ c, sigmaσ​, and n.

c equals=0.90​, sigma σ equals=3.7​, n equals=36

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E equals=

​(Round to three decimal places as​ needed.)

2) The grade point averages​ (GPA) for 12 randomly selected college students are shown on the right. Complete parts​ (a) through​ (c) below.

 Assume the population is normally distributed.

2.2

3.4

2.9

1.8

0.5

4.0

2.3

1.4

3.6

0.3

2.3

3.4

​(a) Find the sample mean.

x over bar x equals=

​(Round to two decimal places as​ needed.)

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