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1.
Follow the steps to compute the variance and standard
deviation for the following population.
49

51

53 55 57 59 61

2.
For a sample of 289 female heights, the mean was 65.3 inches
and the standard deviation was 2.8 inches. The shortest person in this
sample had of 56 inches.
a.
Find the z-score for the height of 56 inches.
b.
What does the negative sign for the z-score represent?
c.
Is this observation a potential outlier according to the three
standard deviation distance criterion? Explain.
3.
A company decides to investigate the amount of sick leave
taken by its employees. A sample of seven employees yields the
following numbers of days of sick leave taken in the past year.
1130162
Use this information to answer parts a through c.
4.

What is the effect of the outlier?

5.
A survey asked 6189 random adults the question “How many
children have you ever had?” Use the results shown below to answer
the following questions.
# no of children
4
5
6

0

1
7

2

3