“Understanding Descriptive Statistics and Correlation in Research: A Case Study on Cannabis Use and Patient Views on Kidney Disease”

What is the standard deviation (s) of the following set of scores?
12
25
6
9
16
13
11
10
8
7
6
14
16
12
11
23
Group of answer choices
7
5.49
5
3.36
What is the range of the following set of scores?
13.7
53.2
4.1
9.3
52.1
32.5
22.9
41.5
23.0
15.5
1.9
33.2
Group of answer choices
39.6
50.2
51.3
9
What is the variance (s2) of the following set of scores?
12
25
6
9
16
13
11
10
8
7
6
14
16
12
11
23
Canadian Adults with kidney disease were selected to participate in a survey regarding their views on cannabis use. The survey asked participants to rank on a scale of 1-5 (1, definitely would not; 5, definitely would) whether they would try cannabis for various symptoms.
Collister, D., Herrington, G., Delgado, L., & Whitlock, R. (2023). Patient views regarding cannabis use in chronic kidney disease and kidney failure: a survey study. Nephrology Dialysis Transplantation, 38(4), 922–931. https://doi-org.ezproxy1.lib.asu.edu/10.1093/ndt/gfac226
What category/scale of measurement is this?
Group of answer choices
ratio
ordinal
nominal
interval
Which of the following are nominal data? (choose one or more)
Group of answer choices
two categories of exposure to a treatment (exposed and unexposed)
three categories (low, medium, high) of heart rate ranges
five categories of race
four categories of satisfaction (low, somewhat satisfied, satisfied, very satisfied)
three streets (Dove, Raven, Hawk) in a neighborhood
Given the following data, what is the correlation between income and education?
Income
Education
$36,577
11
$54,365
12
$33,542
10
$65,654
16
$45,765
11
$24,354
7
$43,233
12
$44,321
12
$23,216
9
$43,454
12
$64,543
14
$43,433
13
$34,644
12
$33,213
10
$55,654
15
$76,545
16
$21,324
10
$17,645
10
$23,432
9
$44,543
15
Group of answer choices
.87
.75
.90
.42
Researchers study the relationship between hours spent playing video games and GPA. They find that as the number of hours spent playing video games increases, GPA decreases. What type of relationship is this?
Group of answer choices
No relationship
Positive relationship
Negative relationship
In this scatterplot:
x axis = scale of income inequality
y axis = patents per million population
Which of statement(s) is(are) TRUE? (choose one or more)
Group of answer choices
This scatterplot shows an indirect relationship
Countries with greater income inequality are less innovative (have less patents per million population)
Countries with greater income inequality have greater innovation (have more patents per million population
This scatterplot shows a direct relationship
Which of the following correlations would be interpreted as a strong relationship based upon our textbook? (choose one or more)
Group of answer choices
.50
.70
.60
.80
What is the possible range of values for a correlation coefficient?
Group of answer choices
0 to 100
–.01 to .01
–1.0 to 1.0
0 to 1.0
Given the following data, what is the correlation between age and length of sentence?
Respondent
Age (x)
Length of Sentence (months)
1
14
80
2
15
65
3
15
155
4
20
192
Average
16
123
Group of answer choices
.65
.79
-.58
-.87
A perfect negative correlation would be represented by Pearson’s r of -1.
Group of answer choices
True
False