Statistics-PSYC 243 SPSS EXERCISE FALL ‘13

PSYC 243

SPSS EXERCISE

FALL ‘13

1. In a study of memory, it
   is known that participants score an average of 65 without the use of
   special recall training. The data for participants who received the
   special recall training are listed below. Determine whether the average
   test score with the recall training is significantly different than the
   average score of participants without the recall training.

Scores
with recall training: 85, 75, 60, 90, 65, 75, 90, 80, 75, 65

1. To measure the
   relationship between amount of sleep and test performance, a psychologist
   obtains a sample of n = 10 college students from an introductory research
   methods course. The students are asked to record the number of hours they
   slept the night before they are administered an exam in the lab. In the
   lab, the psychologist collects the data concerning how many hours each
   student slept the night before. In addition, the psychologist then
   administers an exam and records participants test scores. Determine
   whether there is a significant correlation between these two variables.

Student	# of hours slept	Exam Score
A	9	90
B	8.5	89
C	7.5	81
D	6	66
E	7	74
F	8	88
G	6	82
H	8.5	96
I	6.5	64
J	7	70

3. In order to determine if a
new computer based method of learning math is more effective than traditional
classroom teaching, a psychologist randomly assigned ten children to each of
two groups. One group was given training in how to solve math problems with the
new computer-based method, while the other group received traditional classroom
instruction. All children were then administered the same math test. Determine
whether there is a statistically significant difference between the two means. The
scores generated by each participant can be found in the chart below.

Computer method scores	85	60	74	55	90	66	62	78	59	81
Traditional method scores	90	60	58	72	82	78	59	71	60	70

1. Below are the data from
   a within-subjects experiment involving perceptual ability. The scores are
   number items perceived on a perceptual ability task both before and after
   a sensitivity treatment. Determine
   whether there is a significant difference between the ‘before treatment’
   and ‘after treatment’ scores.

Participant	Before Treatment	After Treatment
A	3	4
B	4	4
C	6	5
D	2	4
E	1	3
F	3	5
G	2	2
H	3	1
I	5	6
J	4	6

1. An experiment is done to
   determine the importance of educational television shows and reading time
   with peers on the development of phonological awareness in young children.
   The experimenters manipulate the variables so that there are four
   conditions—educational television, but no peer reading time (TV), educational
   television as well as peer reading time (TV+PR), no educational television,
   but early peer reading experience (PR), and no educational television and
   no early peer reading experience (CONTROL). After one year of the experiment, phonological
   awareness scores (on a scale of 1-10, 1 being lowest score of phonological
   awareness, 10 being the highest score of phonological awareness) for the
   children are collected. The data from each group are listed below.

TV	TV+PR	PR	CONTROL
4	8	9	2
3	5	10	2
5	9	8	3
4	10	9	1
6	6	9	1
2	9	6	4
2	10	9	2
3	7	8	1
4	10	5	3
3	9	9	1

1. A social psychologist is
   interested in the amount of hand gestures people when they speak to
   others. This psychologist believes
   that, within one particular culture, there is variation in hand gestures
   used based on the area that a person is from. To test this hypothesis, the
   psychologist observes 8 people from 3 different areas and measures how many
   hand gestures they use while speaking to another person for a designated
   amount of time while speaking about one particular topic. The data are
   below. Determine if there is a
   significant difference between any of the groups, and if there is, where
   the difference lies.

Area A	Area B	Area C
12	10	16
22	17	15
19	15	11
18	19	12
23	25	10
16	18	13
19	19	12
20	21	9