Quiz about LT #1: Stats and Data Review

Question 1

What percentage of males drive sports cars?

Accepted Answer

65%

Answer

35%

Answer

16.25%

Answer

25%

Question 2

What percentage of the students were boys?

Accepted Answer

50%

Answer

20%

Answer

25%

Answer

40%

Question 3

Of the times when the forecast called for rain, what is the percentage that it actually rained?

Accepted Answer

About 90%

Answer

About 50%

Answer

About 70%

Answer

About 80%

Question 4

What percentage of girls have blonde hair?

Accepted Answer

30%

Answer

32%

Answer

29%

Answer

40%

Question 5

What is the correlation for the following Scatter Plot.

Accepted Answer

No Correlation

Answer

Weak Positive

Answer

Strong Negative

Answer

Weak Negative

Answer

Strong Positive

Question 6

What is the correlation for the following Scatter Plot.

Accepted Answer

Strong Negative

Answer

Weak Positive

Answer

No Correlation

Answer

Weak Negative

Answer

Strong Positive

Question 7

What is the correlation for the following Scatter Plot.

Accepted Answer

Strong Positive

Answer

Weak Positive

Answer

No Correlation

Answer

Strong Negative

Answer

Weak Negative

Question 8

Given the following Scatter Plot, select the option that is most likely the r value.

Accepted Answer

$$r=.934$$

Answer

$$r=.27$$

Answer

$$r=-.862$$

Answer

$$r=.54$$

Question 9

Given the following Scatter Plot, select the option that is most likely the r value.

Accepted Answer

$$r=-.981$$

Answer

$$r=-.45$$

Answer

$$r=.728$$

Answer

$$r=.12$$

Question 10

Estimate the correlation coefficient for this scatterplot.

Accepted Answer

A) r = -0.9

Answer

B) r = 1

Answer

C) r = 0.9

Answer

D) r = -1

Question 11

The median is the...

Accepted Answer

the middle value

Answer

average of all data values

Answer

the most frequently occurring number

Answer

the difference between the biggest and smallest value

Question 12

What is the value of the upper quartile (Q3)?

Accepted Answer

15

Answer

3

Answer

8

Answer

10

Question 13

What is the maximum value?

Accepted Answer

18

Answer

3

Answer

8

Answer

10

Question 14

Which interval has 400 employees?

Accepted Answer

33-43

Answer

0-10

Answer

77-87

Answer

66-76

Question 15

How many people watched more than 6 hours of TV?

Accepted Answer

17

Answer

10

Answer

5

Answer

20

Question 16

Which interval has the greatest number of employees?

Accepted Answer

44-54

Answer

11-21

Answer

33-43

Answer

77-87

Question 17

How many students received a score of 94%?

Accepted Answer

2

Answer

94

Answer

4

Answer

1

Question 18

Which of the following lines represents the line of best fit for the scatter plot?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 19

Based on the graph, if Joe earned $400, how many hours did he work?

Accepted Answer

25 hours

Answer

35 hours

Answer

45 hours

Answer

15 hours

Question 20

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

Accepted Answer

18 chapters

Answer

12 chapters

Answer

15 chapters

Answer

21 chapters

Question 21

What is the median of this set of data?

Accepted Answer

8

Answer

4

Answer

5.5

Answer

15

Question 22

What is the median for this set of data?

Accepted Answer

202

Answer

214

Answer

316

Answer

165

Question 23

What is the mean of these numbers?
4,5,5,2,3,3,2,8

Accepted Answer

4

Answer

40

Answer

24

Answer

256

Question 24

Find the mean:
28, 18, 19, 18, 17

Accepted Answer

20

Answer

18

Answer

11

Answer

19

LT #1: Stats and Data Review

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