Complete the below:
In SPSS, create a database from the information in Table below.
1. For the variable Math 201:
a. Create the appropriate graph
b. Create the appropriate descriptive statistics
c. What is the most appropriate descriptive statistic? Include the justification for your choices (
d. Write out how you would explain this information to someone who had not had a course in statistics
2. For the variable Math Test:
a. Create the appropriate graph
b. Create the appropriate descriptive statistics
c. What is the most appropriate descriptive statistic? Include your justification for your choices.
d. We know from experience that scores in the middle 50% of the distribution generally do well in our course in statistics. What scores would be the cutoffs for this range?
e. Students who score below the 30th percentile on this test are referred to the Tutoring Center. How many should be referred?
3. For the variable Stat grade:
a. Create the appropriate graph
b. Create the appropriate descriptive statistics
c. What is the most appropriate descriptive statistic? Provide justification for your choices.
d. What is the probability of finding a score of 90 or better?
e. What scores mark the most deviant 10%?
4. Reading readiness of preschoolers from an impoverished neighborhood (n = 20) was measured using a standardized test. Nationally, the mean on this test for preschoolers is 30.9, with s = 2.08.
a. Children below the 30th percentile are in need of special assistance prior to attending school. What score would indicate these children?
b. What percentage of children score between 25 and 28.5?
c. How many children would we expect to find with scores between 28 and 31.5?
d. Children in the top 25% are considered accelerated readers and qualify for different placement in school. What score would mark the cutoff for such placement?
5. Age at onset of dementia was determined for a sample of adults between the ages of 60 and 75. For 15 subjects, the results were Σx = 1008, and Σx2 =67878. Use this information to answer the following:.
a. What is the mean and s for this data?
b. What is the percentile rank for an individual who shows dementia at age 62? (5 pts)
c. If we consider +/-1z to be the normal range of onset, what ages correspond to this?
d. What ages identify the most deviant 20%?
Student Database
|
ID #
|
Gender
|
GPA
|
Math
201
|
Math
Test
|
Stat
Grade
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
Male
Male
Female
Female
Female
Male
Female
Female
Female
Female
Male
Male
Female
Female
Female
Female
Female
Female
Male
Female
Female
Female
Male
Male
Female
|
3.23
3.10
3.75
2.32
2.79
2.13
2.64
2.91
2.27
2.53
3.32
3.73
3.24
3.01
2.94
2.80
2.55
3.23
2.94
3.79
3.65
2.15
3.44
2.26
2.95
|
No
Yes
Yes
No
No
No
No
No
Yes
No
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
Yes
No
No
No
No
|
17
27
35
25
28
18
15
29
38
17
35
32
28
22
18
25
24
40
28
38
35
20
36
27
29
|
78
85
93
74
76
62
58
78
90
60
93
94
90
79
74
72
70
78
73
94
93
62
68
60
60
|