Week 7 Test - Results
Attempt 1 of 2
Written Oct 19, 2025 10:42 PM - Oct 19, 2025 11:40 PM
Attempt Score - 90 %
Overall Grade (Highest Attempt) - 90 %
Question 1 point
A vacation resort rents SCUBA equipment to certified divers. The resort
charges an up-front fee of $25 and another fee of $12.50 an hour. What is
the amount if you rent the SCUBA equipment for 1 hour and 15 minutes?
$40.63
$28.13
$50
$41
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The equation is
Dollars = $12.5(hour) + $25
,1 hour and 15 minutes is 1.25 hours.
Dollars = $12.5(1.25) + $25
Question 2 point
The least squares regression line for a data set is yˆ=5+0.3x and the standard
deviation of the residuals is 0.52.
Does a case with the values x = -1.59, y = 5.78 qualify as an outlier?
Cannot be determined with the given information
No
Yes
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Plug in -1.59 for x.
y = 5 + .3*-1.59
y = 4.523
Residual is y-given - y-predicted.
5.78 - 4.523 = 1.257 -> this is the residual value.
To see if it is an outlier take 2 and multiply it by .52
2*.52 = 1.04
1.257 is greater than 1.04, Yes it is an outlier.
,Question 3 point
The following data represent the weight of a child riding a bike and the rolling
distance achieved after going down a hill without pedaling.
Weight (lbs.) Rolling Distance (m.)
59 26
83 43
97 49
56 20
103 65
87 44
88 48
91 42
52 39
63 33
71 39
100 49
89 55
103 53
, 99 42
74 33
Can it be concluded at a 0.05 level of significance that there is a linear correlation between the two
variables?
yes
no
Cannot be determined
Hide question 3 feedback
Feedback
Copy and paste the data into Excel. Then use the Data Analysis Toolpak and run a Regression.
The y-variable is the distance and the x-variable is the weight. How far the bike will travel will
depend on the weight of the child. You want to predict the distance of the bike. Once you get the
Regression output, look under the Significance F value for the correct p-value to use to make your
decision.
Yes, there is a significant relationship p-value = 0.00011
Question 4 point
The marketing manager of a large supermarket chain would like to use shelf
space to predict the sales of pet food. For a random sample of 15 similar
stores, she gathered the following information regarding the shelf space, in
feet, devoted to pet food and the weekly sales in hundreds of dollars. .
Shelf Weekly
Store
Space Sales
1 5 1.3
Attempt 1 of 2
Written Oct 19, 2025 10:42 PM - Oct 19, 2025 11:40 PM
Attempt Score - 90 %
Overall Grade (Highest Attempt) - 90 %
Question 1 point
A vacation resort rents SCUBA equipment to certified divers. The resort
charges an up-front fee of $25 and another fee of $12.50 an hour. What is
the amount if you rent the SCUBA equipment for 1 hour and 15 minutes?
$40.63
$28.13
$50
$41
Hide question 1 feedback
Feedback
The equation is
Dollars = $12.5(hour) + $25
,1 hour and 15 minutes is 1.25 hours.
Dollars = $12.5(1.25) + $25
Question 2 point
The least squares regression line for a data set is yˆ=5+0.3x and the standard
deviation of the residuals is 0.52.
Does a case with the values x = -1.59, y = 5.78 qualify as an outlier?
Cannot be determined with the given information
No
Yes
Hide question 2 feedback
Feedback
Plug in -1.59 for x.
y = 5 + .3*-1.59
y = 4.523
Residual is y-given - y-predicted.
5.78 - 4.523 = 1.257 -> this is the residual value.
To see if it is an outlier take 2 and multiply it by .52
2*.52 = 1.04
1.257 is greater than 1.04, Yes it is an outlier.
,Question 3 point
The following data represent the weight of a child riding a bike and the rolling
distance achieved after going down a hill without pedaling.
Weight (lbs.) Rolling Distance (m.)
59 26
83 43
97 49
56 20
103 65
87 44
88 48
91 42
52 39
63 33
71 39
100 49
89 55
103 53
, 99 42
74 33
Can it be concluded at a 0.05 level of significance that there is a linear correlation between the two
variables?
yes
no
Cannot be determined
Hide question 3 feedback
Feedback
Copy and paste the data into Excel. Then use the Data Analysis Toolpak and run a Regression.
The y-variable is the distance and the x-variable is the weight. How far the bike will travel will
depend on the weight of the child. You want to predict the distance of the bike. Once you get the
Regression output, look under the Significance F value for the correct p-value to use to make your
decision.
Yes, there is a significant relationship p-value = 0.00011
Question 4 point
The marketing manager of a large supermarket chain would like to use shelf
space to predict the sales of pet food. For a random sample of 15 similar
stores, she gathered the following information regarding the shelf space, in
feet, devoted to pet food and the weekly sales in hundreds of dollars. .
Shelf Weekly
Store
Space Sales
1 5 1.3
