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Fundamentals of Statistics | 4th Edition | ISBN: 9780321838704 | Authors: Michael Sullivan,III
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Putting It Together: How Many Drinks? A question on the

Chapter 5, Problem 54AYU

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QUESTION:

Putting It Together: How Many Drinks?   A question on the General Social Survey was “When you drink, how many drinks do you have?” The results are shown next.

(a) Draw a histogram of the data and  on the shape of the distribution.

(b) Determine the mean and standard deviation for number of drinks.

(c) What is the mode number of drinks?

(d) What is the probability a randomly selected individual consumes two drinks?

(e) Would it be unusual to observe an individual who consumes at least eight drinks? Why?

(f) What shape will the distribution of the sample mean have? Why?

(g) Construct a 95% confidence interval for the mean number of drinks. Interpret this interval.

Questions & Answers

QUESTION:

Putting It Together: How Many Drinks?   A question on the General Social Survey was “When you drink, how many drinks do you have?” The results are shown next.

(a) Draw a histogram of the data and  on the shape of the distribution.

(b) Determine the mean and standard deviation for number of drinks.

(c) What is the mode number of drinks?

(d) What is the probability a randomly selected individual consumes two drinks?

(e) Would it be unusual to observe an individual who consumes at least eight drinks? Why?

(f) What shape will the distribution of the sample mean have? Why?

(g) Construct a 95% confidence interval for the mean number of drinks. Interpret this interval.

ANSWER:

Answer :

Step 1:

       

      Number of drinks

frequency

1

119

2

66

3

27

4

12

5

8

6

5

7

4

8

1

9

0

10

0

11

0

12

1

The distribution is skewed right.

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