STT205 EXAM PRACTICE QUESTIONS AND ANSWERS

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The weights of pupils in the primary school constitute a —————-

sample

number

variable

random

A variable that is not measurable in numerical form or that cannot be counted is called a ——————— variable.

Observation

Q5uantitative

Space

Q5ualitative

——— variable is a variable whose values are given as numerical Q5uantities

Space

Observation

Q5ualitative

Q5uantitative

The difference between the highest and the lowest values in a distribution is called the ————-

mode

range

mean

variance

Equally likely events are those events in which there is no reason to expect ———–event rather than the others to occur

all

no

one

two

Measures of location or central tendency include the following except ——-

the mode

the mean

the median

the range

We have a positive integer n, the product of all the numbers from n down to 1, is called n ……………

Ans. Factional

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Median and mode are measures of ………….

Ans. central tendency

Given the following numbers 2,3,5,6,8,9,11,22, and 34, what is the range of the numbers?

Ans. 32

Permutation can be defined as an ordered arrangement of ………………

Ans. Objects

The …………. Is a measure that shows the most central item in a set of data

Ans. Median

A set with only one element is called a ……………..

Ans. unit set

The variance of a distribution is the …………….. of the standard deviation of the distribution

Ans. Square

5!  5  –  3!; is equal to ………………….

Ans. 60

The ………….. deviation is computed by taking the sum of the absolute values in the distribution from the mean of the distribution and dividing the sum by the number of values in the distribution

Ans. Mean

Asymmetry distribution has a peak at the …………… of the distribution with the slopes on either side of the peak virtually equal to each other

Ans. Middle

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For positive skew, the peak lies to the …………………. Of the center of the distribution

Ans. Left

Asymmetry distribution has a peak at the ………………… of the distribution with the slopes on either side of the peak virtually equal to each other

Ans. Middle

Four factorials (  3  ) is equal to ……………

Ans. 24

.…………… can be defined as the ordered arrangement of objects

Ans. Permutation

.…………. Is used to solve problems involving set theory

Ans. Venn diagram

Set A and B are equal if and only if they contain the same …………………

Ans. Elements

.……….. is a single value computed from the set of data that measures the central item in the data

Ans. Median

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The variance of a distribution is the …………….. of the standard deviation of the distribution

Ans. Square

The combination is an arrangement of objects without regard to ………….

Ans. Order

For the conduct and analyses of biological, physical, medical, and social research, we use _____ extensively.

•statistics

The variable is a characteristic that assumes different _____ for different entities.

•values

_____ is the part of the population that is selected for study.

• Sample

When two events are mutually exclusive, the intersection of the events will be ______

• 0

Probability is defined as a value between _____ that shows the likelihood of occurrence of an events

• 0 and 1

___is a list of questions drawn on the study in which information is required

•Unstructured questionnaire

Variables that take specific values are referred to as

•Discrete

A variable that can assume both decimal and non-decimal values is called_____ variable

• continuous

Surveys, interviews, observations, questionnaires and experiments are the various methods of collecting _____ data

•primary

The weights of pupils in the primary school constitute a

sample

random

variable

number

Entity may be person, place, and things on which we make _____

• observation

The following are types of questionnaire except_____

• Variable questionnaire

There are _____types of questionnaire

•two

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One of the ways to solve problems involving hypergeometric distribution is by the use of _____

• Formula

The variable is a characteristic that assumes different _____ for different entities.

• values

_is a list of questions drawn on the study in which information is required

• Unstructured questionnaire

When two events are mutually exclusive, the intersection of the events will be_____

•0

 Heights of forty-five students of the National Open University of Nigeria form a set of

_____ variables

•Continuous

_____ is a list of questions drawn in such a way that the questions are related to the objectives of the study being conducted

• Questionnaire

Variables which take specific values are referred to as _____

• Discrete

The intersection of Sets A and B is a set of all the elements that are _____ to both sets A and B

• equal common

The direction of the skew depends on the relationship of the peak of the distribution to the center (mean) of the

• histogram

5! / 5 – 3! is equal to …………

60

70

45

16

5! 5 = 3 !; is equal to ____

• 60

Four factorial (3! )is equal to ……….

•24

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Set A and B are equal if and only if they contain the same _____

•elements

Permutation can be defined as an ordered arrangement of ____

•objects

_____ -is a single value computed from the set of data that measures the central item in the data

• median

_-is used to solve problems involving set theory

•Venn Diagram

The combination is an arrangement of objects without regard to ____

 •order

_____ can be defined as an ordered arrangement of objects

• Permutation

The weights of pupils in the primary school constitute a —————-

Sample

number

variable

random

A variable that is not measurable in numerical form or that cannot be counted is called a ——————— variable.

Observation

Q5uantitative

Space

Q5ualitative

——— variable is a variable whose values are given as numerical Q5uantities

Space

Observation

Q5ualitative

Q5uantitative

The difference between the highest and the lowest values in a distribution is called the ————-

mode

Range

mean

Variance

The size of a family is an example of a ——— variable

Continuous

Discrete

Single

Multiple

The ——- is the most preferable when the data have the possibility of extreme values.

mean

mode

range

median

When the distribution is not symmetrical, ————- is revealed

peakness

Kurtosis

skewness

symmetry

As the size of the sample increases, the ——— becomes more useful as a descriptive measure.

mean

median

mode

range

For negative skew, the peak lies to the —————-of the center of the distribution

right

middle

left

north

A graph of the cumulative frequency distribution for any collection of data is called ——————————

ogive

histogram

Olive

polygon

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When we are interested in the peakness of distribution, we are measuring the———————– of the distribution

Kurtosis

skewness

peakness

symmetry

The difference between the highest and the lowest values in a distribution is called the ————-

range

variance

mode

mean

Management uses ————– to make forecasts about the sales and labor cost of a firm.

plan

idea

statistics

data

——– variable is the variable that can only assume whole numbers

Continuous

Space

Discrete

Single

Asymmetry distribution has a peak at the ————–of the distribution with the slopes on either side of the peak virtually equal to each other

Middle

Median and mode are measures of ——————

Central tendency

Four factorial (3!)is equal to —————-

24

The direction of the skew depends on the relationship of the peak of the distribution to the center (mean) of the ————————

histogram

————–is a single value computed from the set of data that measures the central item in the data

.median

——————–is used to solve problems involving set theory

.Venn Diagram

Set A and B are equal if and only if they contain the same ————

.elements

The intersection of Sets A and B is a set of all the elements that are——————–to both sets A and B

.common

The ———–of two sets A and B is another set consisting of all elements either in A or B or both

.union

Given the following numbers: 2, 3, 5, 6, 8, 9, 11, 22, and 34, what is the range of the numbers?

.32

Variables that take specific values are referred to as ————-

.Discrete

Heights of forty-five students of the National Open University of Nigeria forms a set of ————variables

.Continuous

There are ————- types of questionnaire

.two

Probability is defined as a value between ———–that shows the likelihood of occurrence of an events

.0 and 1

————— is a list of questions drawn in such a way that the questions are related to the objectives of the study being conducted

.Questionnaire

A variable that can assume both decimal and non-decimal values is called —————— variable

.continuous

Two events are mutually exclusive when they ———–occur together

.cannot

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The largest number of entities in a study is called ——–

population

————- is the part of the population that is selected for study.

Sample

For the conduct and analyses of biological, physical, medical, and social research, we use ———– extensively.

.statistics

————— is a list of questions drawn in such a way that the questions are related to the objectives of the study being conducted

.Questionnaire

————– is used by businesses in market research to determine the acceptability of a product that will be demanded at various prices by a given population in a geographical area.

.Statistics

——————- is a list of questions drawn on the study in which information is required

.Unstructured questionnaire

Surveys, interviews, observations, questionnaire,s and experiments are the various methods of collecting data

.primary

There are ————- types of questionnaire

.two

The following are types of questionnaire except———

Variable questionnaire

Probability is defined as a value between ——–that shows the likelihood of occurrence of an events

.0 and 1

The largest number of entities in a study is called ——–

.population

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