A data analyst is examining the relationship with student drivers between driving skill and
texting. A driving circuit is set up and a group of students are each tested twice. The first
test is performed while sending and receiving texts and the second test is recorded
without texting. After each of the tests, the number of cones hit by student drivers is
recorded.
What are two appropriate conclusions that should be made?
Choose 2 answers
Dependent variable is continuous.
Independent variable is texting condition.
The distribution is skewed.
A t-test should be used.
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, Independent variable is texting condition.
A t-test should be used.
A data analyst is testing the effects of two types of medication.
Given the following results:
Medication 1 Medication 2
Cured 58 39
Uncured 22 57
The analyst performs the chi-square test. What is the expected count, rounded to the
nearest whole number, of uncured that were given medication 1?
YOUR
ANSWER CORRECT
ANSWER
26
36
44
53
Give this one a try later!
36
Given statistical output in the following table:
Coefficient Std. Error Z Score
(Intercept) -4.13 0.964 -4.28423
Variable 1 0.08 0.026 3.076923
,Variable 2 0.185 0.057 3.245614
Variable 3 0.939 0.225 4.173333
Variable 4 0.001 0.004 0.25
Variable 5 0.043 0.01 4.3
Which variable is considered nonsignificant?
YOUR
ANSWER CORRECT
ANSWER
Variable 1
Variable 2
Variable 3
Variable 4
Variable 5
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Variable 4
Given the following simple linear regression model:
y i = β 0 + β 1x 1,i + β 2x 2,i + β 3x 1,I * x 2,i
What is the definition of x 1,I * x 2,i?
YOUR
ANSWER CORRECT
ANSWER
Response term
Interaction term
Independent term
Dependent term
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, Interaction term
Using the following models:
Model 1: Score = 2035 - 0.277 (Attendance) + 1299 (Extra Curriculum)
Model 2: Score = 7291 - 0.098 (Attendance) + 2325 (Extra Curriculum)
Model 3: Score = 3745 - 0.179 (Attendance) + 3200 (Extra Curriculum) + 3122
(Recommendation)
Assuming other values are constant in all three models, what will changing one unit in
Extra Curriculum result in?
YOUR
ANSWER CORRECT
ANSWER
Changes in score by 3200 in Model 2
Changes in score by 3200 in Model 3
Changes in score by 3200 and 1299 in Models 1 and 3, respectively
Changes in score by 3745 in Model 3
Give this one a try later!
Changes in score by 3200 in Model 3
Given the following equation:
R 2 ad j = 1 - ( n - 1 / n - p)(1 - R 2)
What does n represent?
texting. A driving circuit is set up and a group of students are each tested twice. The first
test is performed while sending and receiving texts and the second test is recorded
without texting. After each of the tests, the number of cones hit by student drivers is
recorded.
What are two appropriate conclusions that should be made?
Choose 2 answers
Dependent variable is continuous.
Independent variable is texting condition.
The distribution is skewed.
A t-test should be used.
Give this one a try later!
, Independent variable is texting condition.
A t-test should be used.
A data analyst is testing the effects of two types of medication.
Given the following results:
Medication 1 Medication 2
Cured 58 39
Uncured 22 57
The analyst performs the chi-square test. What is the expected count, rounded to the
nearest whole number, of uncured that were given medication 1?
YOUR
ANSWER CORRECT
ANSWER
26
36
44
53
Give this one a try later!
36
Given statistical output in the following table:
Coefficient Std. Error Z Score
(Intercept) -4.13 0.964 -4.28423
Variable 1 0.08 0.026 3.076923
,Variable 2 0.185 0.057 3.245614
Variable 3 0.939 0.225 4.173333
Variable 4 0.001 0.004 0.25
Variable 5 0.043 0.01 4.3
Which variable is considered nonsignificant?
YOUR
ANSWER CORRECT
ANSWER
Variable 1
Variable 2
Variable 3
Variable 4
Variable 5
Give this one a try later!
Variable 4
Given the following simple linear regression model:
y i = β 0 + β 1x 1,i + β 2x 2,i + β 3x 1,I * x 2,i
What is the definition of x 1,I * x 2,i?
YOUR
ANSWER CORRECT
ANSWER
Response term
Interaction term
Independent term
Dependent term
Give this one a try later!
, Interaction term
Using the following models:
Model 1: Score = 2035 - 0.277 (Attendance) + 1299 (Extra Curriculum)
Model 2: Score = 7291 - 0.098 (Attendance) + 2325 (Extra Curriculum)
Model 3: Score = 3745 - 0.179 (Attendance) + 3200 (Extra Curriculum) + 3122
(Recommendation)
Assuming other values are constant in all three models, what will changing one unit in
Extra Curriculum result in?
YOUR
ANSWER CORRECT
ANSWER
Changes in score by 3200 in Model 2
Changes in score by 3200 in Model 3
Changes in score by 3200 and 1299 in Models 1 and 3, respectively
Changes in score by 3745 in Model 3
Give this one a try later!
Changes in score by 3200 in Model 3
Given the following equation:
R 2 ad j = 1 - ( n - 1 / n - p)(1 - R 2)
What does n represent?
