The weights (in ounces) of 10 cookies are shown. 0.85 1.33 ...

[Pea0909berry]

The weights (in ounces) of 10 cookies are shown.
 
  0.85 1.33 1.38 0.88 1.29
  0.99 0.89 1.03 1.16 0.81
  Compute the variance.
  A) 0.034 B) 0.046 C) 0.041 D) 0.037

Question 2

Sketch a brief diagram of the standard normal distribution table. You only need to show two sets of values. Identify the z scores and the area scores in the table by circling the scores and writing z score and area by each one.
 
  Describe how to find the area corresponding to a given z score. Describe how to find the the z score corresponding to a given area value.

[bd5255]

Answer to Question 1

B

Answer to Question 2

A quick sketch of a couple of values should be given. The z scores are on the left column and upper row. The area scores are in the body of the table. If you know the z score, you find the value of the tenths place in the left column and to the hundredths in the top row. Then you find the area corresponding to those two values. Given an area, you find the closest value to it in the body of the table. Then you find the corresponding z score from the corresponding left column and top row values.