Statistics and Probability for 7th Grade: Learn Stats and Probability Online

Question 1

Which measure of central tendency is most significantly influenced by extreme values?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Question 2

Which of the following is the correct order of quartiles in a dataset, starting with the smallest value?

Accepted Answer

Q1, Q2, Q3

Answer

Q1, Q3, Q2

Question 3

Which of these is NOT a measure that describes the typical value of a data set?

Accepted Answer

Range

Answer

Mean

Answer

Mode

Question 4

Which of these is a measure of how spread out data is, rather than a measure of the center of the data?

Accepted Answer

Range

Answer

Mean

Answer

Median

Answer

Mode

Question 5

Which of the following is NOT a measure of central tendency?

Accepted Answer

Standard deviation

Answer

Mean

Question 6

Which of these adds up all the values in a dataset and divides by the number of values to find the average?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Question 7

When rolling a standard six-sided die, what is the likelihood of obtaining a six?

Accepted Answer

1/6

Answer

1/3

Answer

1/4

Answer

1/12

Question 8

In a survey of 100 students, 60% indicated owning a smartphone. How many students own a smartphone?

Accepted Answer

60

Answer

36

Answer

40

Answer

100

Question 9

What is the distinction between a population and a sample?

Accepted Answer

A population is the entire group under study, while a sample is a smaller representative subset.

Answer

A population is a hypothetical group, while a sample is a real group.

Answer

A population and a sample are the same thing.

Answer

A sample is the entire group under study, while a population is a smaller representative subset.

Question 10

Which measure of central tendency finds the middle value of a data set arranged in ascending order?

Accepted Answer

Median

Answer

Mean

Answer

Mode

Answer

Range

Question 11

Which of the following is NOT a type of probability?

Accepted Answer

Absolute

Answer

Theoretical

Answer

Experimental

Answer

Subjective

Question 12

Which measure quantifies the spread or variability in a dataset?

Accepted Answer

Range

Answer

Mean

Answer

Median

Answer

Mode

Question 13

Which sampling method ensures that each individual in a population has an equal chance of being selected?

Accepted Answer

Random sampling

Answer

Convenience sampling

Answer

Quota sampling

Answer

Systematic sampling

Question 14

Which measure of central tendency represents the value that appears most often in a data set?

Accepted Answer

Mode

Answer

Mean

Answer

Median

Answer

Range

Question 15

The average of all the data points in a data set is known as the:

Accepted Answer

Mean

Answer

Median

Answer

Mode

Answer

Range

Question 16

To calculate the range of a data set, subtract the:

Accepted Answer

smallest value from the largest value

Answer

largest value from the smallest value

Answer

mean from the median

Answer

mode from the median

Question 17

The z-score of a value that is 2 standard deviations above the mean of a data set with a mean of 10 is:

Accepted Answer

2

Answer

1

Answer

0

Answer

-1

Question 18

Which of these statistical methods can be used to make predictions about future events?

Accepted Answer

Regression analysis

Answer

Hypothesis testing

Answer

Correlation analysis

Answer

ANOVA

Question 19

What is the median of the following set of numbers: 5, 7, 3, 9, 5?

Accepted Answer

5

Answer

3

Answer

7

Answer

9

Question 20

Which of the following is a stem-and-leaf plot?

Accepted Answer

3 | 2 5 7

Answer

3 2 5 7

Answer

3
2
5
7

Answer

|2 3 5 7

Question 21

What is the mode of the following set of numbers: 6, 4, 9, 6, 1, 6?

Accepted Answer

6

Answer

1

Answer

4

Answer

9

Question 22

Which of the following is a scatter plot?

Accepted Answer

A graph that shows the relationship between two variables

Answer

A graph that shows the distribution of a single variable

Answer

A graph that shows the probability of an event

Answer

A graph that shows the central tendency of a dataset

Question 23

Which of these options is a measure of how spread out a set of data is?

Accepted Answer

Standard deviation

Answer

Mean

Answer

Median

Question 24

When working with a data set that contains extreme values, which measure of central tendency is most appropriate to use?

Accepted Answer

Median

Answer

Mean

Answer

Mode

Answer

Range

Question 25

Which of the following is NOT a measure of central tendency?

Accepted Answer

Range

Answer

Mean

Answer

Mode

Answer

Median

Question 26

To calculate the range of a data set, which formula should you use?

Accepted Answer

Range = Highest value - Lowest value

Answer

Range = Mean - Median

Answer

Range = Mode - Mean

Question 27

Which of these is a measure of how spread out a set of data is?

Accepted Answer

Range

Answer

Mean

Answer

Median

Answer

Mode

Question 28

In the data set {1, 2, 3, 4, 5, 6, 7, 8, 9, 100}, which value significantly affects the mean?

Accepted Answer

100

Answer

1

Answer

5

Answer

3

Question 29

Which of the following is NOT a measure of central tendency used to describe the typical value of a dataset?

Accepted Answer

Frequency

Answer

Mean

Answer

Median

Answer

Mode

Question 30

What is the mean of the following data set: 10, 12, 8, 10, 14?

Accepted Answer

12

Answer

10

Answer

11

Answer

13

Question 31

What is the probability of rolling a "6" on a standard six-sided die?

Accepted Answer

1/6

Answer

1/2

Answer

1/3

Answer

1/4

Question 32

Which of the following data sets is NOT valid?

Accepted Answer

{a, b, c, d}

Answer

{2, 4, 6, 8}

Answer

{1, 3, 5}

Answer

{0, 1, 2, 3}

Question 33

Which measure of central tendency is most affected by extreme values?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Question 34

Which measure of central tendency is most affected by extreme values?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Question 35

Which measure of central tendency is most affected by extreme values?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Question 36

Which of the following is NOT a measure of the central tendency of a dataset?

Accepted Answer

Standard deviation

Answer

Mean

Answer

Median

Answer

Mode

Question 37

Which measure of central tendency finds the sum of all values in a data set divided by the number of values?

Accepted Answer

Mean

Answer

Mode

Answer

Range

Answer

Median

Question 38

Which measure of central tendency represents the most frequently occurring value in a data set?

Accepted Answer

Mode

Answer

Median

Answer

Range

Answer

Mean

Question 39

To calculate the range of a data set, we find the difference between the:

Accepted Answer

Greatest and least values

Answer

Mean and median

Answer

Sum of all values

Answer

Mode and median

Question 40

When a coin is flipped twice, what is the probability of getting heads on both flips?

Accepted Answer

0.25

Answer

0.75

Answer

0.5

Answer

1

Question 41

Which of the following measures the spread or dispersion of data?

Accepted Answer

Range

Answer

Median

Answer

Mode

Answer

Mean

Question 42

In the data set {1, 3, 5, 7, 9, 1}, which value appears the most?

Accepted Answer

1

Answer

3

Answer

7

Answer

5

Question 43

What is the average of the data values?

Accepted Answer

Mean

Answer

Median

Answer

Range

Answer

Mode

Question 44

A survey of 100 students showed that 60% of them enjoyed Mathematics. How many students did not enjoy Mathematics?

Accepted Answer

40

Answer

80

Answer

60

Answer

100

Question 45

Which of the following measures of central tendency is not affected by extreme values?

Accepted Answer

Median

Answer

Range

Answer

Mode

Answer

Mean

Question 46

Which of the following is an example of a random experiment?

Accepted Answer

Rolling a dice

Answer

Counting the number of students in a class

Answer

Surveying students about their favorite color

Answer

Measuring the height of a tree

Question 47

Which of the following is NOT a measure of central tendency that summarizes the typical value of a dataset?

Accepted Answer

Range

Answer

Median

Answer

Mode

Answer

Mean

Question 48

Which of the following is the value that appears most frequently in this data set: 2, 4, 6, 6, 8, 10?

Accepted Answer

6

Answer

2

Answer

8

Answer

10

Question 49

The difference between the highest and lowest values in a data set is called the:

Accepted Answer

Range

Answer

Median

Answer

Mean

Answer

Mode

Question 50

In a set of data, which measure summarizes the central value?

Accepted Answer

Mean

Answer

Range

Answer

Mode

Answer

Median

Question 51

When a set of data is arranged in order, what value represents the middle number?

Accepted Answer

Median

Answer

Mean

Answer

Mode

Answer

Range

Question 52

Which measure indicates the value that appears most frequently in a data set?

Accepted Answer

Mode

Answer

Median

Answer

Range

Answer

Mean

Question 53

In a data set, what measure represents the difference between the largest and smallest values?

Accepted Answer

Range

Answer

Median

Answer

Mean

Answer

Mode

Question 54

If an event has no chance of happening, what is its probability?

Accepted Answer

0

Answer

1/2

Answer

1/4

Answer

1

Question 55

A bag contains 5 red marbles and 7 blue marbles. What is the probability of drawing a red marble?

Accepted Answer

5/12

Answer

1/3

Answer

1/2

Answer

1/4

Question 56

Which measure of center is most affected by extreme values, called outliers?

Accepted Answer

Mean

Answer

Mode

Answer

Range

Answer

Median

Question 57

A scatter plot shows that as the number of hours studied increases, the test score tends to increase. What kind of relationship does this show?

Accepted Answer

Positive correlation

Answer

Negative correlation

Answer

No relationship

Question 58

Which of these is an example of a biased sample?

Accepted Answer

Asking only students who play sports about their favorite sport.

Answer

Choosing students randomly from a list of all students.

Answer

Using a questionnaire that asks clear and simple questions.

Question 59

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles.  If you pick one marble without looking, what is the probability it will be green?

Accepted Answer

1/5

Answer

1/2

Answer

5/10

Answer

3/10

Question 60

Which of these is NOT a measure of how spread out data is?

Accepted Answer

Mean

Answer

Variance

Answer

Standard deviation

Answer

Range

Question 61

A company asked 100 customers to rate their satisfaction on a scale of 1 to 5. The average rating was 4.2.  Which measure would best show how much the ratings varied?

Accepted Answer

Standard deviation

Answer

Mode

Answer

Mean

Answer

Range

Question 62

Which scatterplot shows a clear trend where as one value increases, the other value also tends to increase?

Accepted Answer

Image of a scatterplot with a positive correlation

Answer

Image of a scatterplot with no correlation

Answer

Image of a scatterplot with a curved relationship

Answer

Image of a scatterplot with a negative correlation

Question 63

Which of these is a random sample from a school with 1000 students?

Accepted Answer

A group of 100 students chosen by a random number generator.

Answer

A group of 100 students who volunteer to participate in a study.

Answer

A group of 100 students who are all in the same math class.

Question 64

A spinner has 8 equal sections, numbered 1 to 8. What is the chance of landing on an odd number?

Accepted Answer

1/2

Answer

1/8

Answer

1/4

Answer

3/8