1. One common system for computing a grade point average(GPA) assigns 4 points to anA, 3 points to aB, 2 points to aC, 1 point to aD, and 0 points to an F. What is the GPA of a student who gets an A in a 2-credit course, a B in each of two 3-credit courses, a C in a 2-credit course, and a D in a 3-credit course?

The mean grade point score is ______. (Round to the nearest tenth asneeded.)

2.Listed below are amounts(in millions ofdollars) collected from parking meters by a security service company and other companies during similar time periods. Do the limited data listed here show evidence of stealing by the security servicecompany's employees?

SecurityServiceCompany:

1.5

1.7

1.6

1.3

1.5

1.6

1.7

1.5

1.5

1.6

OtherCompanies:

1.6

1.9

1.7

1.8

1.7

1.9

1.7

1.5

1.8

1.6

Find the coefficient of variation for each of the twosamples, then compare the variation.

The coefficient of variation for the amount collected by the security service company is ______%.

(Round to one decimal place asneeded.)

3.The blood platelet counts of a group of women have abell-shaped distribution with a mean of 257.4 and a standard deviation of 68.3. (All units are 1000 cells/L.) Using the empiricalrule, find each approximate percentage below.

a.

What is the approximate percentage of women with platelet counts within 1 standard deviation of themean, or between 189.1 and 325.7?

b.

What is the approximate percentage of women with platelet counts between 52.5 and 462.3?

a. Approximately _ of women in this group have platelet counts within 1 standard deviation of themean, or between 194.3 and 332.1.

(Type an integer or a decimal. Do notround.)

b. Approximately ______of women in this group have platelet counts between 189.1 and 325.7.

Use the following cell phone airport data speeds(Mbps) from a particular network. Find the percentile corresponding to the data speed 3.4 Mbps.

0.1

0.2

0.3

0.3

0.3

0.4

0.5

0.5

0.6

0.6

0.7

0.7

0.8

0.8

0.9

0.9

1.3

1.4

1.7

1.7

1.7

1.8

2.3

2.3

2.4

2.5

2.8

3.2

3.3

3.4

3.5

3.8

4.8

5.2

5.6

5.8

7.3

7.5

10.9

11.2

11.2

11.6

11.6

13.6

14.1

14.2

14.8

14.8

15.8

25.9

Percentile of 3.4=______ (Round to the nearest whole number asneeded.)

4.Use the following cell phone airport data speeds(Mbps) from a particular network. Find Q1.

0.1

0.2

0.3

0.4

0.4

0.4

0.4

0.5

0.5

0.5

0.6

0.6

0.7

0.7

0.8

0.9

1.2

1.5

1.7

1.8

1.8

1.9

2.3

2.7

2.7

2.7

2.8

3.5

3.5

4.6

5.6

5.6

7.4

8.6

9.1

11.4

11.4

11.6

11.7

12.1

12.4

12.5

12.6

13.3

13.7

14.4

14.9

15.8

15.9

30.7

Q1=

nothing

Mbps

(Type an integer or a decimal. Do notround.)

Use the following cell phone airport data speeds(Mbps) from a particular network. Find P70.

0.1

0.1

0.2

0.3

0.3

0.3

0.5

0.6

0.7

0.7

0.7

0.8

0.8

0.8

0.9

0.9

1.3

1.3

1.4

1.5

1.6

1.8

2.1

2.4

2.5

2.7

2.8

2.9

3.4

3.6

3.8

4.2

4.3

4.7

5.8

5.8

6.7

6.9

6.9

7.8

10.9

12.6

12.6

13.4

14.2

14.6

14.9

15.1

15.9

29.4

P70=

nothing

Mbps

1. (Type an integer or a decimal. Do notround.)

The following are the ratings of males by females in an experiment involving speed dating. Use the given data to construct a boxplot and identify the5-number summary.

3.0

4.0

4.5

5.0

6.0

6.0

7.0

7.0

7.0

7.0

7.0

8.0

9.0

9.5

9.5

9.5

10.0

10.0

10.0

10.0

The5-number summary is

,

5 Listed below are the measured radiation absorption rates(in W/kg) corresponding to 11 cell phones. Use the given data to construct a boxplot and identify the5-number summary.

1.18

1.09

0.75

0.99

0.69

, and

nothing

, all inW/kg.