As the new manager of a small convenience store, you want to understand the shopping patterns of your customers. You randomly sample 20 purchases from yesterday's records. The amounts of those purchases (in dollars) are shown to the right. Complete parts a) through d).

38.93 37.67 58.72 21.98 75.64 5.36 34.29 81.68 42.03 73.45 32.26 64.22 47.11 38.69 46.88 46.24 51.46 11.84 32.96 66.64

Question content area bottom

Part 1

a) Is the distribution unimodal or multimodal?

The distribution is

Part 2

b) Where is(are) the mode(s)?

A.

The modes of the data are around $10 and

$80.

B.

The mode of the data is around

$30.

C.

The mode of the data is around

$50.

D.

The modes of the data are around $0 and

$90.

Part 3

c) Is the distribution symmetric?

A.

The distribution is roughly symmetric. It is slightly skewed to the left.

B.

The distribution is roughly symmetric. It is slightly skewed to the right.

C.

The distribution is perfectly symmetric.

D.

The distribution is not symmetric.

Part 4

d) Are there any outliers?

A.

There is at least one outlier between $0 and $20.

B.

There is at least one outlier between $0 and $20 and at least one outlier between $80 and $100.

C.

There are no outliers.

D.

There is at least one outlier between $80 and $100.

After examining a child at his 2-year checkup, the boy's pediatrician said that the z-score for his height relative to other 2-year-olds in the country was 1.35 . Explain to the parents what that means.

He is 1.35. the mean in height for 2-year-olds in the country.

The following contingency table shows opinion about global warming (nonissue vs. serious concern) among registered voters, broken down by political party affiliation (Democratic, Republican, and Independent). Use the table to answer a) through c) below.

Political Party		Opinions on Global Warming
	Nonissue	Serious Concern	Total
Democratic	50		450		500
Republican	290		210		500
Independent	70		130		200
Total	410		790		1200

Question content area bottom

Part 1

a) What is the probability that a randomly selected registered voter who is a Republican believes that global warming is a serious issue?

enter your response here

(Round to three decimal places as needed.)

Part 2

b) What is the probability that a randomly selected registered voter is a Republican given that he or she believes global warming is a serious issue?

enter your response here

(Round to three decimal places as needed.)

Part 3

c) What is P(Serious Concern|Democratic)?