Question

Question 2: Use the following information to complete Exercises 3 – 5: A political scientist took a pool of the political attitudes of the students in one of his classes. Students were asked to rate, on a scale from 1 to 11, “What is your overall political attitude?”, where 1 = extremely liberal and 11 = extremely conservative. The following frequency analysis resulted: (1.5 points)

Political Attitude Score	f	rf	cf	crf
11	1	.015	67	1.000
10	3	.045	66	.985
9	14	.209	63	.940
8	6	.090	49	.731
7	2	.030	43	.642
6	10	.149	41	.612
5	9	.134	31	.463
4	3	.045	22	.328
3	11	.164	19	.284
2	7	.104	8	.119
1	1	.015	1	.015

4. Compute the values that define the following percentiles:

a. 25^th             b. 50^th             c. 57^th             d. 75^th    

What is the interquartile range of the data in #4?

6. Compute the exact percentile ranks that correspond to the following scores:

a. 3            b. 5            c. 7            d. 9

  

Answer 1