STT205 EXAM PRACTICE QUESTIONS AND ANSWERS

Two events are mutually exclusive when they ______ occur together

a. cannot

b. jointly

c. both

d. can

The following are types of questionnaire except ______

a. Fixed-response questionnaire

b. Unstructured questionnaire

c. Variable questionnaire

d. Open ended questionnaire

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

a. Sample

b. Census

c. Event

d. Variable

The weights of pupils in the primary school constitute a _____

a. random

b. number

c. variable

d. sample

One of the ways to solve problems involving hyper geometric distribution is by the use of ____

a. Graph

b. low diagram

c. activities diagram

d. Formula

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

a. Multiple

b. Discrete

c. Continuous

d. Single

Surveys, interview, observation, questionnaire and experiments are the various methods of collecting —————— data

a. secondary

b. primary

c. Multiple

d. random

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

a. observation

b. finding

c. contact

d. investigation

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

a. idea

b. statistics

c. plan

d. data

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

a. idea

b. statistic

c. plan

d. data

A major disadvantage of the —————- is the fact that it does not allow the views of the respondents, which may enhance the quality of the information collected

a. Open ended questionnaire

b. Variable questionnaire

c. Structured questionnaire

d. Unstructured questionnaire

The largest number of entities in a study is called_____

a. variable

b. height

c. population

d. weight

5-3! is equal to ____

a. 120

b. 70

c. 16

e. 60

_______can be defined as an ordered arrangement of objects

a. Combination

b. Probability

c. Permutation

d. Factorial

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

a. not

b. equal

c. common

d. never

Combination is an arrangement of objects without regard to ______

a. magnitude

b. order

c. size

d. line

The —————- deviation is computed by taking the sum of the absolute value of the deviations of the values in the distribution from the mean of the distribution and dividing the sum by number of value in the distribution

a. variance

b. median

c. mode

d. mean

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

a. Kurtosis

b. skewness

c. symmetry

d. peakness

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

a. mean

b. range

c. median

d. mode

Management uses ————– to make forecast about the sales and labour cost of a firm.

a. idea

b. plan

c. data

d. statistics

Range, semi-inter quartile range, mean deviation, standard deviation and coefficient of variation are all measure of ______

a. deviation

b. distribution

c. variation

d. calculation

_________ variable is the variable that can only assume whole numbers

a. Continuous

b. Single

c. Space

d. Discrete

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

a. left

b. middle

c. right

d. north

The ———-is a measure that shows the most central item in a set of data.

a. mode

b. median

c. variance

d. mean

The weights of pupils in the primary school constitute a ____

a. sample

b. Variable

c. random

d. number

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

a. 3

b. 0

c. 1

d. 2

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

a. Multiple

b. Single

c. Continuous

d. Discrete

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

a. contact

b. observation

c. finding

d. investigation

Variable is a characteristic that assumes different ——- for different entities.

a. values

b. Space

c. Observation

d. Sample

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

a. statistics

b. plan

c. data

d. idea

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

a. Single

b. Discrete

c. Continuous

d. Multiple

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

a. the median

b. the mean

c. the range

d. the mode

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

a. histogram

b. polygon

c. ogive

d. olive

The population of primary school pupils in the state of the country to allow the Federal Government plan for the primary education is an example of————data

a. Multiple

b. random

c. secondary

d. primary

The hourly patronage of a restaurant is an example of ————–variable

a. Space

b. Quantitative

c. Observation

d. Negative

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

a. right

b. left

c. middle

d. north

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

a. symmetry

b. skewness

c. peakness

d. Kurtosis

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

a. mean

b. median

c. range

d. mode

Range, semi-inter quartile range, mean deviation, standard deviation and coefficient of variation are all measure of ———————-

a. distribution

b. variation

c. deviation

d. calculation

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

a. Interviewing

b. Questionnaire

c. Observations

d. Surveys

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

a. continuous

b. Discrete

c. sample

d. Unit

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

a. Variable

b. Sample

c. Census

d. Event

There are ————- types of questionnaire

a. three

b. four

c. two

d. five

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

a. statistics

b. data

c. idea

d. Plan

—————–can be defined as an ordered arrangement of objects

a. Combination

b. Probability

c. Permutation

d. Factorial

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

a. event

b. intersection

c. union

d. compliment

 is equal to —————-

a. 60

b. 70

c. 16

d. 45

Median and mode are measure of ——————

a. Dispassion

b. Central tendency

c. location

d. Dispersion

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

a. equal

b. never

c. not

d. common

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

a. 32

b. 30

c. 22

d. 28

If we have a positive integer n, the product of all the whole numbers from n down to 1, is called n —————-

a. Permutation

b. Factorial

c. Probability

d. Combination

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

a. Multiple

b. Discrete

c. Continuous

d. Single

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

a. Nature

b. Observation

c. Qualitative

d. Space

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

a. mode

b. median

c. range

d. mean