Quiz about Statistics

Question 1

To find the _________ you add up all the numbers and then divide by how many numbers you have.

Accepted Answer

Mean

Answer

Median

Answer

Mode

Answer

Range

Question 2

To find the ______ you put all numbers in order from least to greatest and then take the largest number minus the smallest number.

Accepted Answer

Range

Answer

Mean

Answer

Median

Answer

Mode

Question 3

To find the ______ you put all the numbers in order from least to greatest and then see which number you have the most of.

Accepted Answer

Mode

Answer

Mean

Answer

Median

Answer

Range

Question 4

To find the ________ you put all numbers in order from least to greatest and find the number that is in the middle.

Accepted Answer

Median

Answer

Mean

Answer

Mode

Answer

Range

Question 5

Find the median from the list of numbers:
60, 58, 52, 48, 60, 67

Accepted Answer

59

Answer

58

Answer

60

Answer

118

Question 6

What is the mode of the data?

Accepted Answer

1 book

Answer

9 books

Answer

3 books

Answer

0 books

Question 7

What is the mean of test scores?
{70, 70, 80, 85, 85, 90, 95, 95, 100, 100}

Accepted Answer

87

Answer

85, 95, and 100

Answer

30

Answer

85 and 90

Question 8

Find the range.
5, 15, 10, 20, 15, 10, 15

Accepted Answer

15

Answer

5

Answer

10

Answer

13

Question 9

What is the interquartile range (IQR)?

Accepted Answer

4

Answer

64

Answer

60

Answer

8

Question 10

This is a histogram

Accepted Answer

false

Answer

true

Question 11

How many cities have temperatures between 70 degrees and 99 degrees?

Accepted Answer

44

Answer

34

Answer

26

Answer

62

Question 12

How many students have 0 Brothers and Sisters?

Accepted Answer

6 students

Answer

0 students

Answer

12 students

Answer

10 students

Question 13

The mean age of employees at a company is 40.

The median age of employees at the same company is 35

A new employee is hired who is 55 years old.

Which of these is possible?

Accepted Answer

The mean age increases and the median age stays the same

Answer

The mean age stay the same and the median increases

Answer

The mean age stay the same and the median decreases

Answer

The mean age decreases and the median increases

Question 14

What is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2

Accepted Answer

7.26

Answer

6.89

Answer

10.1

Answer

9

Question 15

What is the variance for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2

Accepted Answer

52.77

Answer

47.47

Answer

102.01

Answer

81

Question 16

Mrs. Algebra's class has an average grade of 87. Later on she realizes she left out Joe's score. His grade was a 65. The new mean will ,....

Accepted Answer

decrease

Answer

increase

Answer

stay the same

Question 17

What is the outlier in the following data set?  100,98,88,92,150,105, 85,115

Accepted Answer

150

Answer

115

Answer

88

Question 18

Two sections of a class took the same quiz.  Section A had 15 students who had a mean score of 80, and section B had 20 students who had a mean score of 90.  Overall, what was the approximate mean score for all students on the quiz?

Accepted Answer

C. 85.7

Answer

A. 84.3

Answer

B. 85.0

Answer

D. None of these

Question 19

Polly's Polls asked 1724 third year college students if they have already taken their science requirements. According to the colleges, 20% of all third year college students have already taken their science requirements. Polly's Polls got less than 344 students who said they have already taken their science requirements. How likely is this result?

Accepted Answer

48.01%

Answer

4.23%

Answer

37.59%

Answer

63.24%

Question 20

Polly's Polls asked 2108 third year college students if they have already taken their science requirements. According to the colleges, 25% of all third year college students have already taken their science requirements. Polly's Polls got less than 527 students who said they have already taken their science requirements. How likely is this result?

Accepted Answer

50%

Answer

39.58%

Answer

2.24%

Answer

65.23%

Question 21

What percent of the drivers interviewed are female?

Accepted Answer

75%

Answer

180%

Answer

0.75%

Answer

180%

Question 22

How many interviewed like skateboards but DO NOT like snowmobiles?

Accepted Answer

45

Answer

80

Answer

25

Answer

10

Question 23

The distribution of heights of adult American men is approximately Normal with mean 69 inches and standard deviation 2.5 inches.
What percent of men are taller than 74 inches?

Accepted Answer

2.5%

Answer

5%

Answer

16%

Answer

1%

Question 24

The distribution of heights of adult American men is approximately Normal with mean 69 inches and standard deviation 2.5 inches. Between what heights do the middle 95% of men fall?

Accepted Answer

64-74

Answer

66.5-71.5

Answer

61.5-76.5

Answer

65-73

Question 25

find the outlier

10, 13, 15, 18, 19, 21, 23, 23, 40

Accepted Answer

40

Answer

10

Answer

23

Answer

none of the above

Question 26

Question 26.

Accepted Answer

The slope decreased and the r²increased.

Answer

The slope increased and the r² decreased.

Answer

The slope decreased but r² remained the same.

Answer

Both slope and r² remained the same.

Question 27

What is the joint relative frequency that a person surveyed likes Classical music and Pop music?

Accepted Answer

0.41

Answer

0.82

Answer

0.76

Answer

0.97

Question 28

180 people filled out a survey about their favorite color. 95 of the respondents were female. 21 males responded that their favorite color is red. What is the approximate conditional frequency that a person surveyed was a male whose favorite color is red?

Accepted Answer

0.22

Answer

0.12

Answer

0.25

Answer

0.33

Question 29

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 30

What type of association does this graph have?

Accepted Answer

negative

Answer

positive

Answer

none

Answer

all of the above

Question 31

Find the equation of the line of best fit for the given data

Accepted Answer

y= 4.19x - 163.41

Answer

y=163.41x + 4.19

Answer

y=-163.41x + 4.19

Answer

y=-4.19x + 163.41

Question 32

What is the correlation?

Accepted Answer

No correlation

Answer

Negative correlation

Answer

Positive correlation

Answer

All of the above

Question 33

Which of the following could be a possible line of best fit for the data?

Accepted Answer

y = -5/2x + 20

Answer

y = -x + 19

Answer

y = x + 20

Answer

y = 2/3x + 15

Question 34

Adam's Z-score on a test is +2.5.  What does this mean?

Accepted Answer

He scored 2.5 standard deviations above the average.

Answer

He'd better start studying.

Answer

He did better than EVERYONE.

Answer

He did terrible.

Question 35

Joanne's Z-score is -1.5.  What does this mean?

Accepted Answer

She scored 1.5 standard deviations below the average.

Answer

She didn't take the test yet.

Answer

She did better than most people.

Answer

No clue

Question 36

If Gonzalo's score is 87, the class average is 82, and the SD is 4, what is Gonzalo's Z-score?

Accepted Answer

+1.25

Answer

-1.25

Answer

+1.20

Answer

+1.02

Question 37

Jill's Z-score on the same test was a +3.0. (average was 82 and SD was 4).
What was her actual score?

Accepted Answer

94 %

Answer

85 %

Answer

79 %

Answer

40 %

Question 38

All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Statistics

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