Question
In: Statistics and Probability
A researcher measures the relationship between the number of interruptions during a class and time spent...
- A researcher measures the relationship between the number of
interruptions during a class and time spent "on task" (in minutes).
Answer the following questions based on the results provided.
Number of
InterruptionsTime Spent "On Task" 9 15 3 37 7 17 2 32 - Part (a)
-
Compute the Pearson correlation coefficient. (Round your answer to three decimal places.)
-
Part (b)
Multiply each measurement of interruptions times 3 and recalculate the correlation coefficient. (Round your answer to three decimal places.)
-
Part (c)
Divide each measurement in half for time spent "on task" and recalculate the correlation coefficient. (Round your answer to three decimal places.)
Solutions
Expert Solution
The statistical software output for this problem is:
Also,
Correlation coefficient doesn't depend on change of origin and scale. Hence,
a) r = -0.937
b) r = -0.937
c) r = -0.937
orchestra answered 2 years agoRelated Solutions
A researcher measures the relationship between the number of interruptions during a class and time spent...
A researcher measures the relationship between the number of
interruptions during a class and time spent "on task" (in minutes).
Answer the following questions based on the results provided.
Number
of
Interruptions
Time Spent
"On Task"
8
15
4
38
7
18
2
32
Part (a)
Compute the Pearson correlation coefficient. (Round your answer
to three decimal places.)
Part (b)
Multiply each measurement of interruptions times 3 and
recalculate the correlation coefficient. (Round your answer to
three decimal places.)
Part...
A researcher measures the relationship between the number of interruptions during a class and time spent...
A researcher measures the relationship between the number of
interruptions during a class and time spent "on task" (in minutes).
Answer the following questions based on the results provided.
Number of Interruptions - 9, 4, 6,3
Time Spent "On Task"- 18, 38, 17, 32
Part (a) Compute the Pearson correlation coefficient. (Round
your answer to three decimal places.)
Part (b) Multiply each measurement of interruptions times 3 and
recalculate the correlation coefficient. (Round your answer to
three decimal places.)
Part...
A researcher measures the relationship between the number of interruptions during a class and time spent...
A researcher measures the relationship between the number of
interruptions during a class and time spent "on task" (in minutes).
Answer the following questions based on the results provided.
Number
of
Interruptions
Time Spent
"On Task"
11
15
6
37
9
20
4
32
Part (a)
Compute the Pearson correlation coefficient. (Round your answer
to three decimal places.)
Part (b)
Multiply each measurement of interruptions times 3 and
recalculate the correlation coefficient. (Round your answer to
three decimal places.)
Part...
A researcher measures the relationship between sleep medication use (times used per week) and time spent...
A researcher measures the relationship between sleep medication
use (times used per week) and time spent working (in hours per
week). Answer the following questions based on the results
provided.
Sleep
Medication Use
Time Spent
Working
9
16
4
39
7
18
2
31
Part A) Compute the Pearson correlation coefficient. (Round
your answer to three decimal places.)
Part B) Multiply each measurement of drug use times 3 and
recalculate the correlation coefficient. (Round your answer to
three decimal places.)...
A researcher measures the relationship between sleep medication use (times used per week) and time spent...
A researcher measures the relationship between sleep medication
use (times used per week) and time spent working (in hours per
week). Answer the following questions based on the results
provided.
Sleep
Medication Use
Time Spent
Working
8
16
3
39
7
19
2
30
A) Compute the Pearson correlation coefficient. (Round your
answer to three decimal places.)
_____
B) Multiply each measurement of drug use times 3 and recalculate
the correlation coefficient. (Round your answer to three decimal
places.)
_____...
A researcher measures the relationship between sleep medication use (times used per week) and time spent...
A researcher measures the relationship between sleep medication
use (times used per week) and time spent working (in hours per
week). Answer the following questions based on the results
provided.
Sleep Medication Use
9,4, 7, 3
Time Spent Working
16, 38, 18, 31
Compute the Pearson correlation coefficient. (Round your answer
to three decimal places.)
Multiply each measurement of drug use times 3 and recalculate
the correlation coefficient. (Round your answer to three decimal
places.)
Divide each measurement in half...
A researcher believes that there is a positive relationship between the time spent in studying and...
A researcher believes that there is a positive relationship
between the time spent in studying and the score a student gets at
the end of the semester. She selected a sample of students and
recorded the following data:
Time Spent in minutes
Score out of 100
120
86
75
83
60
78
45
75
180
91
30
72
90
84
After analyzing the data using Microsoft Excel, the researcher
got the outputs below:
Answer the following (Please, use at least...
A teacher is interested in the relationship between the time spent studying for an exam and...
A teacher is interested in the relationship between the time
spent studying for an exam and exam score. The table lists scores
for 5 students. The value of b0 = 67.91 and the value of b1 = 0.75
Hours studied 5 18 3 15 17 Exam score 63 87 79 72 82 . Step 4 of 6
: Calculate the Coefficient of Determination (R2). Round answer to
four decimal places.
Is there a relationship between the dollars spent each week on recreation and the number of...
Is there a relationship between the dollars spent each week on
recreation and the number of members of the family? Do larger
families spend more on recreation? Ten Chicago families shared the
following information:
Family
Size
3
6
5
6
6
3
4
4
5 3
Amount
Spent
99
104 151
129 142
111
74
91
119 91
h. Predict the recreational spending for a family of size 5.
i. If there are families of that size in the data...
A sports researcher is interested in determining if there is a relationship between the number of...
A sports researcher is interested in determining if there is a
relationship between the number of home wins depends on the sport.
A random sample of 200 games is selected and the results are given
below.
Football Basketball Soccer Baseball
Home team wins 30 20 15 35
Visiting team wins 20 30 35 15
What is the test statistic value for the above data?
A 4
B 10
C 20
D None of the above
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