Provide descriptive statistics for your program. How many males and how many females were enrolled in your program? (Give n and % for each.) Give the mean, median, standard deviation, minimum, and maximum for the GRE Math Post variable separately for each section of the course (homework/no homework; round to two decimal places). Did students’ scores on the GRE Math exam improve after the course, compared to their scores before the course? What type of t-test should you use to answer this question? Provide the following statistics from your output: t-value = Degrees of Freedom = p-value = Mean Difference = 95% Confidence Interval = ( , ) Cohen’s d = Data Age Sex (M=1, F=2) GRE Math Pre Homework (Y=1, N=0) GRE Math Post Satisfaction 17 1 134 1 154 8 20 2 145 1 145 6 19 2 149 1 152 7 22 2 144 1 150 5 22 1 154 1 163 2 23 1 153 1 154 10 25 2 160 1 161 10 18 2 152 1 147 7 21 2 152 1 167 8 20 1 130 1 166 8 37 1 140 1 160 10 18 1 136 1 166 10 45 1 150 1 170 7 26 1 155 1 170 10 39 2 160 1 169 9 58 2 136 0 158 10 21 2 130 0 152 8 20 2 148 0 168 10 17 1 147 0 154 8 36 2 156 0 155 3 20 1 130 0 150 5 22 1 139 0 150 8 27 1 138 0 148 9 21 2 140 0 149 6 23 2 167 0 166 8 24 2 158 0 142 10 40 1 143 0 155 5 21 2 155 0 160 10 20 1 139 0 145 4 19 2 142 0 152 9

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

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Provide descriptive statistics for your program.
1. How many males and how many females were enrolled in your program? (Give n and % for each.)
2. Give the mean, median, standard deviation, minimum, and maximum for the GRE Math Post variable separately for each section of the course (homework/no homework; round to two decimal places).
Did students’ scores on the GRE Math exam improve after the course, compared to their scores before the course?
1. What type of t-test should you use to answer this question?
2. Provide the following statistics from your output:
  1. t-value =
  2. Degrees of Freedom =
  3. p-value =
  4. Mean Difference =
  5. 95% Confidence Interval = ( , )
  6. Cohen’s d =

Data

Age	Sex (M=1, F=2)	GRE Math Pre	Homework (Y=1, N=0)	GRE Math Post	Satisfaction
17	1	134	1	154	8
20	2	145	1	145	6
19	2	149	1	152	7
22	2	144	1	150	5
22	1	154	1	163	2
23	1	153	1	154	10
25	2	160	1	161	10
18	2	152	1	147	7
21	2	152	1	167	8
20	1	130	1	166	8
37	1	140	1	160	10
18	1	136	1	166	10
45	1	150	1	170	7
26	1	155	1	170	10
39	2	160	1	169	9
58	2	136	0	158	10
21	2	130	0	152	8
20	2	148	0	168	10
17	1	147	0	154	8
36	2	156	0	155	3
20	1	130	0	150	5
22	1	139	0	150	8
27	1	138	0	148	9
21	2	140	0	149	6
23	2	167	0	166	8
24	2	158	0	142	10
40	1	143	0	155	5
21	2	155	0	160	10
20	1	139	0	145	4
19	2	142	0	152	9

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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