# Probs And Stats 1

25 Questions | Total Attempts: 121  Settings Create your own Quiz • 1.
What is the best sampling technique to be used for determining the average speed of the cars on a section of the highway?
• A.

Simple Random sample

• B.

Convenience sample

• C.

Systematic sample

• D.

Cluster sampling

• 2.
Mr. Black samples his class by selecting all students sitting in group 1 and group 5 in his classroom. This sampling  method is called
• A.

Stratified

• B.

Cluster

• C.

Simple

• D.

Convenience

• 3.
Mrs. Allen samples her class by selecting every third person on her class list. Which type of sampling method is this?
• A.

Simple

• B.

Systematic

• C.

Cluster

• D.

Stratified

• 4.
Which of the following is discrete data?
• A.

Sam is 160 metres tall

• B.

Sam weighs 60 kg

• C.

Sam ran 100metres in 10 seconds

• D.

Sam has two brothers and one sister

• 5.
Which of the following is continuous data?
• A.

The cat has 2 eyes

• B.

The cat has 2 kittens

• C.

The cat has four paws

• D.

The cat weighs 5.4kg

• 6.
A researcher is interested in the travel time of University students. A group of 50 students in interviewed. Their mean travel time is 16.7 minutes. For this study the mean of 16.7minutes is an example of a
• A.

Parameter

• B.

Population

• C.

Sample

• D.

Statistic

• 7.
A researcher is interested in the IQ level of the students at the Mico University. The entire group of students is an example of
• A.

Population

• B.

Parameter

• C.

Sample

• D.

Statistic

• 8.
Statistical techniques that summarize and organize data are classified as
• A.

Descriptive statistics

• B.

Inferential statistics

• C.

Population statistics

• D.

Sample statistics

• 9.
The median is always
• A.

The middle score when results are ranked in order of magnitude

• B.

The same as the mean

• C.

The most frequently occurring score in the data set

• D.

The difference between the maximum and minimum scores

• 10.
What is the mean of the scores : 2, 5, 4, 1, 8?
• A.

4

• B.

3.5

• C.

5

• D.

20

• 11.
What is the mean of the scores shown in the frequency distribution?
• A.

2.9

• B.

5.8

• C.

3.0

• D.

1.5

• 12.
What is the median of the following scores 8, 1, 2, 5, 4?
• A.

4

• B.

3.5

• C.

4.5

• D.

7

• 13.
A teacher gave a statistics test to a group of students and computed the measures of central tendency for the test scores. Which of the following cannot be an accurate description of the scores?
• A.

The majority of students have scores above the median

• B.

The majority of students have scores above the mean

• C.

The majority of students have scores above the mode

• D.

None of the options mentioned

• 14.
Which of the following statements is the most accurate description of standard deviation?
• A.

The total distance from the smallest score to the highest score

• B.

The squared average distance between all scores and the mean

• C.

The square root of the total distance from the smallest score to the highest score

• D.

The average distance between a score and the mean

• 15.
What is the variance of 2, 2, 2,, 2, 2?
• A.

0

• B.

2

• C.

22

• D.

25

• 16.
Which of the following has the greatest range?
• A.

2, 5, 8, 11

• B.

13, 13, 13, 13

• C.

20, 25, 26, 27

• D.

42, 43, 44, 45

• 17.
Which of the following is NOT a measure of dispersion?
• A.

Mean

• B.

Lower quartile

• C.

Standard deviation

• D.

Variance

• 18.
The lengths of cabbage leaves were measured, to the nearest cm, and the information grouped as shown in the table below. The limits of the class intervals are
• A.

Option 3. 8, 12, 17

• B.

5, 5, 5, 5

• C.

9.5, 14.5, 19.5, 24.5, 29.5

• D.

10, 14, 15, 19, 20, 25, 29

• 19.
Among a group of employees, the highest paid receives a weekly wage of \$105.40. If the range of the wages is \$27.50, how much does the lowest paid employee receive?
• A.

\$77.90

• B.

\$66.45

• C.

\$27.50

• D.

\$105.40

• 20.
The bar chart shows the number of students who bought different books, how many students bought exactly 4 books?
• A.

8

• B.

9

• C.

10

• D.

14

• 21.
What is the mode of the distribution shown?
• A.

5

• B.

7

• C.

8

• D.

14

• 22.
Which of the following is NOT a statistical diagram?
• A.

Bar Chart

• B.

Pie Chart

• C.

Frequency polygon

• D.

Modal Class

• 23.
The boundaries of the class interval 10 - 14 are best recorded as
• A.

10 and 14

• B.

9.5 and 10

• C.

9.5 and 14.5

• D.

10.5 and 14.5

• 24.
The semi interquartile range is
• A.

The difference between the upper and lower boundaries

• B.

The difference between the upper and lower quartiles

• C.

Half the difference between the upper and lower quartiles

• D.

Half of the difference between the upper and lower boundaries

• 25.
The table shows the masses of 50 people. calculate the mean mass
• A.

51.3

• B.

52.3

• C.

53.0

• D.

53.5

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