Statistics

STAT 200

1. The answers to the following questionnaire items are based upon what scale of measurement? (4 responses)

a) What is your height?

b) What is your weight?

c) What is your occupation?

d) How does this course compare with others you have taken?

(answers would be greater than, less than, equal to, etc.)

2. According to the table below, about what percentage of the flights had 19 or fewer empty seats?

a) 15%

b) about 29%

c) about 71%

d) cannot be determined

Number of empty seats	Frequency
0 up to 5	3
5 up to 10	8
10 up to 15	15
15 up to 20	18
20 up to 25	12
25 up to 30	6

3. Complete this frequency distribution.

Number of empty seats	F	RF
0 up to 5	3
5 up to 10		.03
10 up to 15	8
15 up to 20		.15
20 up to 25	18
Total	34	1

4. Ratio level data are the “lowest level” of measurement and the data must be mutually exclusive.

True False

5. The midpoint of 0 up to 5 class is

a) 2

b) 4

c) 2.5

d) 0

All Time Box Office Revenues Aggregated by Months (used for questions 5 – 7)

Rank	Month	Gross	Movies Tracked
1	February, 2009	796,343,640	161
2	February, 2010	745,693,066	173
3	February, 2008	659,270,466	193
4	February, 2004	666,141,251	201
5	February, 2007	693,647,238	176
6	February, 2003	613,460,961	207
7	February, 2005	692,957,988	185
8	February, 2006	652,426,175	193
9	February 2002	529,353,345	98

6. Calculate the mean for the gross revenues.

7. Calculate the mean for the Movies tracked.

8. Calculate the standard deviation for the movies tracked.

9. There are 14,233 members in Stone, Clay, and Glass Union. Randomly, 327 were selected for an opinion survey. The 327 can be considered as the population.

True False

10. Maria has just finished reading in his textbook about the study of grades earned in introductory courses at UMUC. She sees that the mean grade for history is 2.71, whereas the mean grade in political science is 3.10. Based on this information she decides to switch his major to political science, where he feels it will be more likely he could receive an A in his courses. Do you think Maria’s decision is appropriate based on data?

11. The ages for a sample of 10 women who have just given birth to their first child are 16, 25, 31, 19, 22, 20, 19, 25, 17, and 27. Compute each of the following descriptive measures:

a) the range

b) the variance

c) the standard deviation

12. Calculate the standard deviations for the following set of measurements:

a) 10, 8, 6, 0, 8, 3, 2, 8, 0

b) 20, 1, 2, 5, 4, 4, 0

13. Paramount Studios has won the most Oscars than any other studio. Below is a chart indicating the movie and the box office receipts. On average, what are the box office receipts for Oscar movies under this studio name?

Titantic $600,788,188

Terms of Endearment $108,423,489

Forrest Gump $329,694,499

Ordinary People $ 54,766,923

Braveheart $ 75,609,945

14. Calculate the standard deviation for the lowest three profit making movies.

15. Explain to me a concept from one of the first few chapters in your own words. Teach me as if I never understood the concept. You can write up to 100 words. Spelling, grammar, and precise content count.