Question

Here is a chart depicting some of the data I collected at the beginning of the semester.

ID#	What is your GPA?	What grade are you in?	How many books have you read this year?
1	3.74	Sophomore	8
2	3.07	Junior	2
3	3.2	Junior	5
4	3.5	Freshman	10
5	2.75	Freshman	1
6	2.6	Senior	2
7	2.72	Junior	8
8	3.4	Junior	3
9	4	Freshman	3
10	3	Junior	3
11	3.2	Senior	2
12	2.5	Junior	2
13	3.1	Senior	15
14	3	Freshman	2
15	3.184	Junior	1
16	3.2	Senior	2

1. What is the population of interest, and what is the sample in this study?

2. Was random selection used? Explain your answer.

3. Was random assignment used? Explain your answer.

4. Calculate the mean, median, and mode of the number of books read this year.

5. Add another participant who read 56 books this year. Calculate the mean, median, and mode again. How does this new piece of data effect the calculations?

6. Calculate the range, variance, and standard deviation for the original 16 participants.

7. Draw a bar graph depicting average GPA by year in college.

Answer 1

1) Population of interest- Students study in particular collage

Sample- GPA, Books read

2) It seems to be simple random sample of students taken from the entire population.

3)

4)

Mean=

Median= 3

Mode= 2

5)

Using Excel, use the following commands

Range- "=MAX()-MIN()"

variance- "=VAR"

Standard deviation- "=stdev"

6)