Question

Create a frequency distribution for the given data starting at 15 with a class width of 4 and then answer the following questions:

ACT Scores

18 23 24 31 19

27 26 22 32 18

35 27 29 24 20

18 17 21 25 26

a. Number of classes is **BLANK-1**.

b. Lower class limit of the 3rd class is
**BLANK-2** and the upper class limit of the 3rd class
is **BLANK-3**.

c. The mid point of the 4th class is
**BLANK-4**.

d. Frequency for each of the first 4 classes are
**BLANK-5**,**BLANK-6**,
**BLANK-7**, and **BLANK-8**.

Answer #1

6. Using the class data (see Blackboard file - "Class Survey
Data - PSS-10 and GAS") calculate the correlation between the GAS –
Goal disengagement and the GAS – Goal reengagement scores. Write
the results in a statistical statement.
7. Using the class data calculate the correlation between the
GAS – Goal disengagement and the PSS-10 scores. Write the results
in a statistical statement.
8. Using the class data calculate the correlation between the
GAS – Goal reengagement scores and...

Data set for ages of students in stats class:
17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,19,
20, 20, 20, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
24, 25, 25, 25, 26, 26, 27, 28, 28, 28, 28, 29, 29, 32, 36, 42
1) Compute the 5-number summary and create a modified box-plot,
using the inner-quartile range to identify any outliers.

Given the following frequency table of data, what is the
potential outlier?
Value
Frequency
15
1
16
0
17
3
18
4
19
6
20
10
21
3
22
2
23
1
24
0
25
0
26
0
27
0
28
0
29
0
30
1
Select the correct answer below:
30
18
23
19
17

For the following data set, put the data into a frequency
distribution table, starting at 10 with a row width of 5. Then put
the data from the frequency distribution table into a histogram.
Label the axis with midpoint markers.
12, 16, 32, 24, 18, 30, 19, 26, 25, 35, 17, 20, 23, 23, 30

Consider the following data:
25
24
18
20
21
18
16
20
23
17
15
13
19
23
24
20
16
26
21
24
15
22
16
12
20
23
19
26
20
25
21
19
21
25
23
26
21
19
20
14
(a)
Develop a frequency distribution
using classes of 12-14, 15-17, 18-20, 21-23, and 24-26.
Class
Frequency
12-14
15-17
18-20
21-23
24-26
Total
(b)
Develop a relative frequency
distribution and a percent frequency distribution using the classes...

A study was conducted to see if students’ writing skills
continue to improve as the academic year progresses. English 101
students were asked to write essays throughout the year in
September, December, March and June. The scores were compared to
see if there is any improvement in this one-year course. Was there
a significant improvement?
The appropriate test for this problem is:
one-way ANOVA
repeated measurements
Student
September
December
March
June
1
17
23
21
24
2
25
21
21...

Cassie and Amir are trying to control the number of text
messages they send. They record the number they send every day in
April.
Cassie:
22, 21, 24, 20, 31, 19, 13, 23, 16, 12, 17, 15, 14, 11, 8, 24,
19, 14, 19, 27, 22, 26, 25, 20, 24,
I 8, 28, 12, 18, 22
Amir: 12, 8, 9, 3, 2, 12, 33, 28, 32, 28, 29, 13, 16, 14, 30,
26, 31, 32, 32, 13, 16, 26, 18,...

The following data are believed to have come from a normal
distribution. Use the goodness of fit test and = .05 to
test this claim. Use Table 12.4.
18
23
21
24
18
22
18
22
19
13
10
20
17
20
20
20
17
14
24
23
22
43
28
27
26
29
28
33
22
28
Using six classes, calculate the value of the test statistic (to
2 decimals).______
The p value is ? _________
Conclusion? Cannot reject assumption...

Twenty-five students from Harry High School were accepted at
Magic University. Of those students, 10 were offered athletic
scholarships and 15 were not. Mrs. Hermione believes Magic
University may be accepting people with lower ACT scores if they
are athletes. The newly accepted student ACT scores are shown
here.
Athletic scholarship: 16, 24, 20, 25, 24, 23, 21, 22, 20, 20
No athletic scholarship: 23, 25, 26, 30, 32, 26, 28, 29, 26, 27,
29, 27, 22, 24, 25
Part...

*in r studio file
4. The director of admissions of a small college selected 120
students at random from the new freshman class in a study to
determine whether a student’s grade point average (GPA) at the end
of the freshman year (y) can be predicted from the ACT test score
(x). Estimate the simple linear regression of, y = β0 + β1x + ε,
using gpa.txt data and answer the following questions. (4
pts each)
(c) Obtain a predicted...

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