2) If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: 2.00, 1.00, 0, 1.00, 2.00? Why?

A.

The z score of 1.00 is most preferable.

B.

The z score of 0 is most preferable.

C.

The z score of 2.00 is most preferable.

D.

The z score of 1.00 is most preferable.

E.

The z score of 2.00 is most preferable

3)Which of the following is NOT a value in the 5-number summary?

Choose the correct answer below.

Median

Mean

Q1

Minimum

4)Here are costs of 10 electric smoothtop ranges rated very good or excellent by a consumer magazine. Find a) mean, b) median and quartiles, and c) range and IQR.

$1000135075065090011501200900600600

a) The mean price of the electric smooth top ranges is

$enter your response here.

b) The median price of the electric ranges is

Q1=

Q3=

c) The range of the distribution of prices is

IQR=

5)

A simple quantitative data set has been provided. Use limit grouping with the first class of 0-4 and a class width of 5 to complete the chart.	7	15	28	17	26
17	6	12	13	3
12	19	25	2	15
3	19	22	15	0

a. Determine a frequency distribution.

Class	Frequency
0-4	enter your response here
enter your response here-enter your response here	enter your response here
enter your response here-enter your response here	enter your response here
enter your response here-enter your response here	enter your response here
enter your response here-enter your response here	enter your response here
enter your response here-enter your response here	enter your response here

6)The table below shows the probability distribution of the random variable X.

a.

Find the mean of the random variable.

b.

Obtain the standard deviation

of the random variable.

x	1	2	3
P(X=x)	0.1	0.1	0.8

a.

Find the mean of the random variable.

=enter your response here

(Round to two decimal places as needed.)

b.

Obtain the standard deviation

of the random variable.

=enter your response here

(Round to two decimal places as needed.)

7)A coffee franchise is opening a new store. The company estimates that there is a 75% chance the store will have a profit of $45,000, a 15% chance the store will break even, and a 10% chance the store will lose $3,500. Determine the expected gain or loss for this store.

The expected value is

$enter your response here.

(Round to the nearest cent as needed.)

8) A citrus farmer has observed the following distribution for the number of oranges per tree. How many oranges does he expect on average?

Oranges	15	20	25	30
Probability	0.20	0.40	0.20	0.20

The farmer expects

enter your response here

oranges on average.

(Type an integer or a decimal.)

9)Assume that when adults with smartphones are randomly selected, 41% use them in meetings or classes. If 5 adult smartphone users are randomly selected, find the probability that exactly 3 of them use their smartphones in meetings or classes.

The probability is

enter your response here.

(Round to four decimal places as needed.)