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WorksheetsChapter 9 Review
Total questions: 80
Worksheet time: 4hrs 13mins
Which sentence describes the relationship shown on this scatter plot?
As the temperature decreases, the visitors increase.
As the temperature increases, the number of visitors increases.
As the visitors increase, the temperature decreases.
No correlation
As x increases, y decreases
As x increases, y increases
As x decreases, y decreases
What type of correlation does this graph have?
positive
negative
none
all of the above
What is the correlation?
Negative correlation
No correlation
Positive correlation
Non-linear Correlation
No Correlation
Positive, Linear Correlation
Negative, Linear Correlation
Graph A
Graph B
Graph C
Graph D
This implies that one variable has a direct affect on the other variable.
Correlation
Causation
Correlation or Causation?
The number of times you come to tutoring and your test scores improving
Correlation
Causation
Correlation or Causation?
The inches of snowfall and the number of heart attacks
Correlation
Causation
What are the coordinates of the outlier?
(1,9)
(9,1)
(2,2)
y=x
A
B
C
D
Estimate the correlation coefficient for this scatterplot.
A) r = 1.2
B) r = 0.89
C)r = 0
D) r = -0.89
Estimate the correlation coefficient for this scatterplot.
A) r = -0.9
B) r = 1
C) r = 0.9
D) r = -1
Average time spent listening to music per day and average time spent watching TV per day. r=−.17
strong positive
strong negative
weak positive
weak negative
Score on science exam and number of words written on the essay question. r=.28
strong positive
strong negative
weak positive
weak negative
Number of steps taken per day and number of kilometers walked per day. r=.92
strong positive
strong negative
weak positive
weak negative
What is the equivalent percent to 0.05?
50%
500%
5%
0.05%
136 out of 200 college students had a student loan. Calculate the percent.
68%
14.7%
6.8%
71%
How many males were surveyed?
77
15
150
52
What number should go in the blue box?
21
135
19
22
How many total have no cell phone?
13
9
22
100
How many total people were surveyed?
78
22
70
100
A survey was given to decide what sport males & females prefer to watch on TV. What is the GRAND TOTAL of people that were surveyed?
48
52
100
36
How many males were surveyed?
48
52
31
36
How many females were surveyed?
48
52
31
36
How many males that were surveyed prefer basketball?
13
15
20
48
How many females that were surveyed prefer football?
23
16
13
52
How many total people prefer baseball?
36
31
33
100
How many total people prefer football?
36
31
33
100
What is the JOINT relative frequency of a female preferring basketball (take the inner cell divided by the grand total)?
31%
100%
52%
16%
Which scatterplot shows a negative relationship?
Which shows a line of best fit?
If m = 8/5 and b = -8/5, what is the equation of the trend line in y= mx + b?
0 = 8/5 (1) - 8/5
y = -8/5 x + 8/5
y = 8/5 x - 8/5
y = mx + b
If m = -3/4 and b = 9, what is the equation of the trend line in y= mx + b?
0 = -3/4 (9) +9
y = -3/4 x + 9
y = -3/4 x - 9
y = 3/4 + 9
The scatterplot shows the temp, in degrees, outside a house every hour for 10 hours.
Estimate the temp after 13 hours based off the trendline.
57.5
50
10
13
61.5
What does the x variable represent?
The number of laps
The amount of time in hours
The amount of time in minutes
How long it takes to go 0 laps
{(4,5), (4,-7), (4,2), (4,0), (4,9)}
Does the graph represent a function?
Yes
No
Does the graph represent a function?
Yes
No
y = 3x + 1
Find the slope of the table.
(a)
Find the slope of the table.
(a)
Find the slope of the table.
-1/2
-2
1/2
2
