Quiz about statistics

Question 1

Calculate the MEAN for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

Accepted Answer

7.44

Answer

7

Answer

8

Answer

7 and 8

Question 2

Calculate the MEDIAN for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

Accepted Answer

7

Answer

7.44

Answer

8

Answer

7 and 8

Question 3

Calculate the MODE for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

Accepted Answer

7 and 8

Answer

7

Answer

7.44

Answer

8

Question 4

Calculate the relative frequency of having an IQ score in the 131-140 range. (200 7th graders were surveyed).

Accepted Answer

4%

Answer

8%

Answer

20%

Answer

15.5%

Question 5

How many 7th graders had an IQ score in the 81-90 range?

Accepted Answer

13

Answer

6.5

Answer

3

Answer

42

Question 6

How many data points are greater than 34?

Accepted Answer

12

Answer

10

Answer

11

Answer

13

Question 7

Question 7.

Accepted Answer

Running

Answer

Kayaking

Answer

Cycling

Answer

Swimming

Question 8

What is the definition of the mean?

Accepted Answer

The average

Answer

The middle number

Answer

The difference between the highest and lowest numbers

Answer

The number that occurs the most

Question 9

Can there be more than one mode?

Accepted Answer

Yes

Answer

No

Question 10

What is the median?

Accepted Answer

62

Answer

58

Answer

66

Answer

60

Question 11

A sample in which each individual or object in the entire population has an equal chance of being selected.

Accepted Answer

random sample

Answer

biased sample

Answer

population

Answer

sample

Question 12

A sample that does not fairly represent the population.

Accepted Answer

biased sample

Answer

population

Answer

random sample

Answer

sample

Question 13

15 students out of 20 succeed in Math quiz. The percentage of students who succeed is:

Accepted Answer

75%

Answer

25%

Answer

0.75

Answer

None of choices

Question 14

Calculate the mean and median for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

Accepted Answer

mean: 7.44 median: 7

Answer

mean: 7 median: 7

Answer

mean: 7.44 median: 8

Answer

mean: 7 median: 7.44

Question 15

Using the frequency table, determine which statement is true.

Accepted Answer

The mean is larger than the median.

Answer

The median is larger than the mean.

Answer

The mean and median are the same.

Answer

Cannot be determined

Question 16

Range means

Accepted Answer

Largest minus smallest

Answer

Most frequent

Answer

Average

Answer

In the middle

Question 17

The heights of 4 different people are: 1.55m, 1.52m, 1.81m, and 1.91m. The range of these heights is:

Accepted Answer

0.39m

Answer

0.21m

Answer

0.27m

Answer

0.16m

Question 18

. Mean of 20 observations is 17. If in the observations, observation 40 is replaced by 12, find the new mean

Accepted Answer

15.6

Answer

15.5

Answer

17

Answer

18

Question 19

Mean of 36 observations is 12. One observation 47 was misread as 74. Find the correct mean

Answer.

Accepted Answer

11.25

Answer

11.20

Answer

15

Answer

16

Question 20

Determine the mean of first 10 natural numbers.

Accepted Answer

5.5

Answer

5.6

Answer

10.5

Answer

11.5

Question 21

If the median of data (arranged in ascending order) 31, 33, 35, x, x+10, 48, 48, 50 is 40, then find value of x.

Accepted Answer

35

Answer

40

Answer

50

Answer

60

Question 22

The scores of an English test out of 100 of 20 students are given below :

75, 69, 88, 55, 95, 88, 73, 64, 75, 98, 88, 95, 90, 95, 88, 44, 59, 67, 88, 99.

Find the median

Accepted Answer

88

Answer

90

Answer

95

Answer

100

Question 23

What is the middle number, or the mean of the two middle numbers, in an ordered set of data?

Accepted Answer

median

Answer

mode

Answer

IQR

Answer

lower quartile

statistics

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