AnswersAlgebra IData Analysis

Data Analysis — Test Answers

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1
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Which range of time values describes the entire interval over which she would be interpolating?

A
0 to 18 minutes
B
0 to 30 minutes
C
18 to 30 minutes
D
0 to 5 minutes
2
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What is the value of g in the relative frequency table? Round the answer to the nearest percent.

A
33 percent
B
25 percent
C
63 percent
D
68 percent
3

Which is most likely true of the data set represented by the regression model on the graph?

A
Each point in the data set is near the regression line.
B
The regression model is inaccurate, as it does not begin at 0 comma 0 .
C
The regression model is an accurate representation of the distance for any number of hours hiked.
D
Each point in the data set falls on the regression line.
4

How does the word count of an essay relate to its score in the contest?

A
Word count tends to increase as the score decreases.
B
Word count has no apparent relationship to the score of the essay.
C
Word count tends to remain constant as the score decreases.
D
Word count tends to decrease as the score decreases.
5

What is the correlation coefficient for the data in the table?

A
0 point 2 8
B
negative 0 point 2 8
C
0 point 5 7
D
negative 0 point 5 7
6

What statement is true about the mean of the sums of the two spinners?

A
The mean is 16.
B
The mean is 12.
C
The mean is the same as the median.
D
The mean is the same as the range.
7

Which statement must be true according to the dot plot?

A
The data is skewed and shows that he typically sent about 6 to 8 text messages per day.
B
The data is symmetric and shows that he sent 11 or 12 texts with the same frequency that he sent 1 or 2 texts.
C
The data is symmetric and shows that he typically sent about 6 to 8 text messages per day.
D
The data is skewed and shows that he sent 11 or 12 texts with the same frequency that he sent 1 or 2 texts.
8

Which model best represents the data?

A
y is equal to 27 x minus 4
B
y is equal to 34 times 1 point 2 0 4 to the x th power
C
y is equal to 47 times 1 point 1 9 1 to the x th power
D
y is equal to 26 point 9 x minus 1 point 3
9

Which best describes the strength of the model?

A
a weak positive correlation
B
a weak negative correlation
C
a strong negative correlation
D
a strong positive correlation
11

Which phrases describe the relationship between heart rate and daily intake of caffeine? Choose two correct answers.

A
constant correlation
B
positive correlation
C
decreasing heart rate
D
negative correlation
E
increasing heart rate
12

What is the variance of the data set? Round to the nearest hundredths.

A
0 point 7 2
B
2 point 1 4
C
0 point 4 0
D
1 point 1 5
13

What is the correlation coefficient for the data shown in the table?

A
1
B
0
C
5
D
4
14

How many rain gauges recorded rainfall?

A
16
B
11
C
2
D
8
15

Which statement best describes the shape of the graph?

A
The graph is nearly symmetrical.
B
The graph is skewed left.
C
The graph is skewed right.
D
The graph is perfectly symmetrical.
16

Which values are correct? Choose three correct answers.

A
c is equal to 23
B
b is equal to 18
C
e is equal to 31
D
A is equal to 15
E
d is equal to 35
17

When x is equal to 4 , what is the residual?

A
1
B
3
C
negative 1
D
negative 3
18

What is the residual value when x is equal to 3 ?

A
0 point 1 2
B
negative 0 point 1 2
C
0 point 8 8
D
negative 0 point 8 8
19

Which are the missing residual values?

A
g is equal to 2 and h is equal to negative 1
B
g is equal to negative 2 and h is equal to 1
C
g is equal to negative 28 and h is equal to negative 39
D
g is equal to 28 and h is equal to 39
20

The data set represents the total number of people who bought bananas each hour at a grocery store. 1, 1, 5, 5, 7, 8, 8, 10, 12 Which box plot correctly represents the data?

A
Image with description A solid number line with a box-and-whisker plot. The number line is labeled from 0 to 16 in increments of 2. The left whisker extends from 3 to 5. The box spans from 5 to 12, with a vertical line inside the box at 7. The right whisker extends from 12 to 13.
B
Image with description A solid number line with a box-and-whisker plot. The number line is labeled from 0 to 16 in increments of 2. The left whisker extends from 2 to 4. The box spans from 4 to 12, with a vertical line inside the box at 8. The right whisker extends from 12 to 14.
C
Image with description A solid number line with a box-and-whisker plot. The number line is labeled from 0 to 16 in increments of 2. The left whisker extends from 4 to 6. The box spans from 6 to 12, with a vertical line inside the box at 8. The right whisker extends from 12 to 14.
D
Image with description A solid number line with a box-and-whisker plot. The number line is labeled from 0 to 16 in increments of 2. The left whisker extends from 3 to 4. The box spans from 4 to 12, with a vertical line inside the box at 7. The right whisker extends from 12 to 13.
21

Which could be a conditional relative frequency table?

A
Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'cap A'; Column 3, 'cap b'; Column 4, 'Total' Row 2: Column 1, 'cap c'; Column 2, '0 point 7 5'; Column 3, '0 point 2 5'; Column 4, '0 point 5 0' Row 3: Column 1, 'cap d'; Column 2, '0 point 2 5'; Column 3, '0 point 7 5'; Column 4, '0 point 5 0' Row 4: Column 1, 'Total'; Column 2, '0 point 5 0'; Column 3, '0 point 5 0'; Column 4, '1 point 0'
B
Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'cap A'; Column 3, 'cap b'; Column 4, 'Total' Row 2: Column 1, 'cap c'; Column 2, '0 point 2 5'; Column 3, '0 point 2 5'; Column 4, '0 point 5 0' Row 3: Column 1, 'cap d'; Column 2, '0 point 2 5'; Column 3, '0 point 2 5'; Column 4, '0 point 5 0' Row 4: Column 1, 'Total'; Column 2, '0 point 5 0'; Column 3, '0 point 5 0'; Column 4, '1 point 0'
C
Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'cap A'; Column 3, 'cap b'; Column 4, 'Total' Row 2: Column 1, 'cap c'; Column 2, '0 point 6 5'; Column 3, '0 point 3 5'; Column 4, '1 point 0' Row 3: Column 1, 'cap d'; Column 2, '0 point 3 5'; Column 3, '0 point 6 5'; Column 4, '1 point 0' Row 4: Column 1, 'Total'; Column 2, '1 point 0'; Column 3, '1 point 0'; Column 4, '1 point 0'
D
Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'cap A'; Column 3, 'cap b'; Column 4, 'Total' Row 2: Column 1, 'cap c'; Column 2, '0 point 2 5'; Column 3, '0 point 7 5'; Column 4, '1 point 0' Row 3: Column 1, 'cap d'; Column 2, '0 point 3 5'; Column 3, '0 point 6 5'; Column 4, '1 point 0' Row 4: Column 1, 'Total'; Column 2, '0 point 3 0'; Column 3, '0 point 7 0'; Column 4, '1 point 0'

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