1) Insurance companies are interested in the average health costs each year for their clients, so that they can determine the costs of health insurance

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1) Insurance companies are interested in the average health costs each year for their clients, so that they can determine the costs of health insurance. Match the vocabulary word with its corresponding example.

________ The 400 clients that the insurance company included in this study

 

________ The average health care cost each year for all of the insurance company's clients

 

________ The average health care cost each year for the 400 clients that the insurance company included in this study

 

________ The list of the 400 annual health care costs for the clients that the insurance company include in the study

 

_________ All of the insurance company's clients

 

_________ The cost each year for health care

 

a. Sample

b. Population

c. Parameter

d. Variable

e. Statistic

f. Data

 

2)In a student survey, forty-one part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:

 

Please round your answer to 4 decimal places for the Relative Frequency if possible.

 

# of Courses Frequency Relative Frequency Cumulative

Frequency

1 ------------ 0.3171 -----------

2 15 0.3659 28

3 13 -------- 41

 

 What percent of students take exactly one courses?__________ %

 

3)Here is a dataset:

12 18 23 19 17

29 37 31 20 20

14 11 25 29 22

42 21 35 47 26

48 20 22 34 19

21 21 20 16 31

You are examining the data with a stem-and-leaf plot. Here is the start of the plot. Finish the plot.

1# | 12467899

2# | 00001112235699

3# | 11457

4# | ______________

 

4) A researcher gathered data on hours of video games played by school-aged children and young adults. She collected the following data:

13 10 17 9 8 4 12 10 1 15

11 14 7 15 14 5 16 15 8 12

13 7 13 10 14 6 13 5 5 13

4 2 1 12 8 14 0 14

 

(a) Complete the frequency distribution for the data.

 

Hours Frequency Relative Frequency

0-2 _______ _________

3-5 _______ _________

6-8 ________ _________

9-11 ________ _________

12-14 ________ _________

15-17 ________ _________

 

(b) draw the correct histogram for this data?

 

5)To compute a student's Grade Point Average (GPA) for a term, the student's grades for each course are weighted by the number of credits for the course. Suppose a student had these grades:

 

3.9 in a 5 credit Math course

1.9 in a 2 credit Music course

2.9 in a 5 credit Chemistry course

2.8 in a 4 credit Journalism course

 

What is the student's GPA for that term? Round to two decimal places.

 

Student's GPA = _________

 

6) Here is a set of sample data.

78 80 58 8 14 48 96 89 10 32

87 20 40 24 75 12 56 17 94 7

31 63 38 99 30 82

 

Base on the data above, identify the 5 number summary 

_______, ________, _______, ________, __________

 

7) The five number summary of a dataset was found to be:

47, 52, 57, 68, 69

An observation is considered an outlier if it is below:

__________

An observation is considered an outlier if it is above:

___________

 

8)he following refer to the following data set:

 

95 80 30 89 22 41 52 65 65 46

 

What is the mean=_______  (Please show your answer to one decimal place.)

 

What is the median of this data set?

 

median = _______

 

What is the mode of this data set?

 

mode = ________

 

9) Every year, the students at a school are given a musical aptitude test that rates them from 0 (no musical aptitude) to 5 (high musical aptitude). This year's results were:

 

Aptitude Score Frequency

0 2

1 1

2 5

3 7

4 2

5 2

 

The mean (x¯) aptitude score: _________ (Please show your answer to 1 decimal place.)

 

The median aptitude score: _________

 

The mode aptitude score: _________ (Please separate your answers by ',' in bimodal situation. Enter DNE if there is no mode.)

 

10)Calculate both the sample and the population standard deviations using the data below.

 

x 23 11 3 14 21

 

Please show the following answers to 1 decimal place.

 

Sample Standard Deviation (s) = ________

Population Standard Deviation (σ)=_______