Question

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.

Answer #1

The Department of Energy provides fuel economy ratings for all
cars and light trucks sold in the United States. Offered are the
estimated miles per gallon for city driving for the 186 cars
classified as midsize in 2016, arranged in increasing order: 11 11
11 12 13 13 13 14 14 14 14 14 15 15 15 15 15 15 16 16 16 16 16 16
16 16 16 16 16 16 16 17 17 17 17 17 17 18...

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...

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...

The results of a sample of 372 subscribers
toWiredmagazine shows the time spent using the Internet
during the week. Previous surveys have revealed that the population
standard deviation is 10.95 hours. The sample data can be found in
the Excel test data file.
What is the probability that another sample of 372 subscribers
spends less than 19.00 hours per week using the Internet?
Develop a 95% confidence interval for the population mean
If the editors of Wiredwanted to have the...

____________________________________________
The results of a sample of 372 subscribers to Wired
magazine shows the time spent using the Internet during the week.
Previous surveys have revealed that the population standard
deviation is 10.95 hours. The sample data can be found in the Excel
test data file.
What is the probability that another sample of 372 subscribers
spends less than 19.00 hours per week using the Internet?
____________________________________________
Develop a 95% confidence interval for the population mean
____________________________________________
If the editors...

A set of numbers such as those below is meaningless without some
background information. The INDIVIDUALS here are Newcomb's 66
repetitions of his experiment. We need to know exactly WHAT
VARIABLE he measured, and in WHAT UNITS. Newcomb measured the time
in seconds that a light signal took to pass from his laboratory on
the Potomac River to mirror at the base the Washington Monument an
back, a total distance of about 7400 meters. Just as you can
compute the...

A set of numbers such as those below is meaningless without some
background information. The INDIVIDUALS here are Newcomb's 66
repetitions of his experiment. We need to know exactly WHAT
VARIABLE he measured, and in WHAT UNITS. Newcomb measured the time
in seconds that a light signal took to pass from his laboratory on
the Potomac River to mirror at the base the Washington Monument an
back, a total distance of about 7400 meters. Just as you can
compute the...

Use Stats Disk if needed!!
Question=
Based on this data, create an interval for which we would
consider it "usual" for a randomly selected participant to fall
within.
1-6
2-1
3-1
4-4
5-6
6-8
7-2
8-2
9-4
10-5
11-7
12-10
13-6
14-3
15-2
16-1
17-Something
.............
18-1
19-2
20-3
21-5
22-7
23-8
24-2
25-3
26-2
27-2
28-4
29-3
30-4
31-6
32-1
33-1
34-6
35-4
36-4
37-3
38-1
39-1
40-5
41-8
42-1
43-7
44-9
45-2
46-9
47-7
48-8
49-4
..........
50-2

*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...

Person
number
X
Value
Y
Value
Person number
X
Value
Y
Value
Person number
X
Value
Y
Value
1
24
30
11
39
42
21
21
27
2
42
53
12
60
65
22
33
29
3
20
27
13
34
40
23
25
27
4
31
30
14
24
26
24
22
25
5
22
24
15
51
57
25
28
33
6
46
47
16
80
83
26
34
40
7
52
60
17
28
27
27
53...

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