SMS 201 TMA ANSWERS 1-4

Q1 The scientific method for collecting, organizing, summarizing, presenting and analysing data is called

statistics

mathematics

analysis

numerical

Q2 The normal distribution curve is otherwise known as

leptokurtic

platykurtic

mesokurtic

normalkurtic

Q3 The degree of peakedness of a distribution is known as

moment

deviation

skewness

kurtosis

Q4 The standard deviation of the set of data 7,6,3,4,10 is

3.45

2.45

4.45

5.45

Q5 The mean deviation of the set of data 7,6,3,4,10 is

2

3

4

5

Q6 The mean deviation of the set of data 8,7,11,6,16,4,11

11

12

13

14

Q7 Find the mode of the data below 2,3,3,4,2,6,3,3,4,4,4

1.5

2.5

3.5

4.5

Q8 Which of the following gives the median of a grouped frequency distribution

Lm + (N/2 – CFm­1)Cm \r\nFm+1 Fm CFm­1

Lm + (N/2 – CFm­1)Cm

) Lm ­ (N/2 – Fm)Cm

(d) Lm + (N/2 – CFm­1)Cm

Q9 Find the median of the following data 8,3,5,2,6,7,3,9

5.5

5

4.5

4

Q10 Find the root mean square of the heights in ft of 5 students in a class – 3,2,4,6,7

4.775

2.775

3.775

4.7

Q11 Obtain the harmonic mean of the following data 3,2,6,4,

3.1

4.1

3.2

4.2

Q12 Obtain the geometric mean of the following data 3,2,6,4

3.46

3.56

2.46

4.46

Q13 24. The following are advantages of arithmetic mean except

it is easy to compute

it has determinate exact value

it can be distorted by extreme values in the distribution

it provides a good measure of comparison

Q14 1. The number of employees in commercial banks in Ibadan are given as 4368, 4387, 4331, 4383,

4356, 4369. Find the mean (a)

3370.14

45470

4370

4370.14

Q15 The heights in meters of 12 wallnut seeding, after twenty years growth are 4, 5, 6, 3, 7, 2, 8, 5, 3, 4.8,

4.5, 7.2, 5.2.

5

5.17

4

4.17

Q16 These are problems encountered in the construction of index numbers except

the choice of items

the choice of a base period unit

the choice of weights

the choice of considered

Q17 Forecast simply means statement (a) (b)©

that predicts future with the help of both past and present

that predicts past with the help of both past and future information

that calculating the trend estimate of the information

none of the above

Q18 It has been found that 2% of the tools produced by a certain machine are defective. What is the

probability that in a shipment of 400 such tools

0.006

­0.006

0.007

­0.007

Q19 One way in which a representative sample may be obtained from a population is by

simple random sampling

hard random sampling

random sample

sampling population

Q20 Sampling distribution is the ___________

Most fundamental of inductive statistics

most of inductive sample

inductive fundamental of population

statistical sampling population

Q21 The scientific method for collecting, organizing, summarizing, presenting and analysing data is called

statistic

mathematics

analysis

numerical

Q22 The two main types of statistics are

inductive and encryptive

inductive and descriptive

encryptive and descriptive

inductive and decriptive

Q23 The number of times that a variable occur is called

mode

median

mean

frequency

Q24 Frequency distribution involves

table showing values of variable(s) and rates of occurrence

classification of data in rows and columns

distribution of measures of variation

distribution of data by measures of location

Q25 The probability that an event will occur is

0 <P(E) <1

1 <P(E) <0

0 <P(E) <1

1 <P(E) <0

Q26 The probability of obtaining an even number in a single toss of a fair die is

⅔

⅓

½

¼

Q27 The mode of the set of data 1,2,3,3,2, 1 is

0

2

3

1

Q28 If a die is tossed once. What is the probability of obtaining even or prime number?

⅔

⅓

⅕

⅚

Q29 Find the mode of the data below 2,3,3,4,2,6,3,3,4,4,4

1.5

2.5

3.5

4.5

Q30 The range of the set of data 5,4,4,3,3,3,3 is

7

3

4

2

Q31 The probability of obtaining at least two heads in a toss of a fair die trice is

0

½

⅓

¼

Q32 The harmonic mean of 2,4,6 is

6

0.9167

0.3056

3.27

Q33 Obtain the geometric mean of the set of data 2,4,6

36

6

3.63

4

Q34 The sum of the absolute difference between consecutives set of data xj and mean x of the data divided

by the number of data is

range

mean deviation

error of deviation

standard deviation

Q35 Two events A and B are said to be _____, if they cannot occur together

independent event

non­mutually exclusive event

mutually exclusive event

mutually inclusive event

Q36 The degree of asymmetry, or departure from symmetry of a distribution is known as

deviation

kurtosis

skewness

mean

Q37 The third moment about the mean of the data 2,3,4,5,6 is

4.4

44

88

440

Q38 The range of the set of data 20,21,23,25,28,30,35,37,38,40 is

29.7

29

20

3

Q39 The arithmetic mean of 5,5,5,5,7,7,7,8,8,8,8,8,6,6,4,4 is

6.31

8

7

63.1

Q40 Sampling distribution is the ___________

Most fundamental of inductive statistics

most of inductive sample

inductive fundamental of population

statistical sampling population

Q41 A particular value of the population, such as the mean income or the level of formal education, is

called

parameter

population

sample

variable

Q42 _________ combine the features of cross­sectional and time­series data.

secondary data

panel data

census

cross sectional data

Q43 The two sources of data are _______ and _________

publication and paper

article and write­up

primary and secondary

National news paper and census

Q44 Data collected for cross­section of subjects (population under study) at a time is called _______

primary data

secondary data

time series data

cross sectional data

Q45 Data collected on a particular variable or set of variables over time is know as _______

primary data

secondary data

population data

time series data

Q46 _____ advocate that the current year quantities are taken as weights

Dorbish­ Bowley

Irving Fisher

Paasche's price

Edward

Q47 _______ advocated the geometric cross of Laspeyre’s and Paasche’s Price index numbers

Dorbish­ Bowley

Irving Fisher

Kennesian

Adam Smith

Q48 Aggregate of prices (of all the selected commodities) in the current year as a percentage of the

aggregate of prices in the base year know as _____

unweighed method

weighted method

macro economics

sample method

Q49 reflect changes in the retail prices of different commodities. The are normally constructed for

different classes of consumers know as _____

index

price index number

value index number

retail price index number

Q50 reflect changes in the volume of goods produced or consumed know as ___

index

price index number

value

quantity index number

Q51 most common index numbers are the price index numbers which study changes in price level of

commodities over a period of time is know as ________

card number

Index numbers

pvc number

price index number

Q52 _________ are indicators which reflect the relative changes in the level of certain phenomenon in any

given period

arithemmetic number

Index numbers

year number

pvc number

Q53 Under certainty, the decision maker simply ______ the outcome of each alternative and selects the

one that best meets his/her objective

select

appraises

happy

ignor

Q54 _______ looks for the attributes or qualities of the product .i.e. comparison of the best one

critical examinations

attribute listening

thinking

alternative chioce

Q55 ________ is the comparison of one thing with another that has similar features

analogies

random

sample

selection

Q56 ________is a method base on two head is better than one.

brai storming

management meeting

conference

broad meeting

Q57 _______ Is the logical approach, it answers questions like What, Who, Where, How, When and Why

critical examinations

brain storming

conference

broad meeting

Q58 ______ defined as the logical and quantitative analysis of all the factors influencing a decision

Choice

Economic defination

Decision analysis

Demand and Supply

Q59 ________ thinking considers end rather than means

leaders

group

creative

analytical

Q60 The art of problem solving and decision making is base on _________

leader and position

authority

common sense

power

Q61 analysis is the modern approach to decision making both in economics and in business

Demand and Supply

Trend line

Regression

Decision

Q62 Pearson’s No. 2 coefficient of skewness uses the difference between the ____

skewness of the distribution

Variance and mean of the distribution

mean and the mode

mean and the median of the distribution

Q63 A complete absence of skewness would have a coefficient of skewness equal to ________

alfa level

half

one

zero

Q64 leptokurtic, platykurtic and mesokurtic is otherwise known as __________distribution curve

ordinary

normal

frequency

arithemetic

Q65 _________ measures the degree of peakedness of a distribution. It is usually taken relative to a

normal distribution

skewness

Kurtosis

mesokuit

platkurtic

Q66 The moment coefficient of kurlosis is used to calculate the _____ of a distribution

peakedness

mesokurtic

skewness

platkurtic

Q67 Pearson’s first coefficient of skewness and Pearson’s second coefficient of skewness is called

_____________

measures of variation

measures of variance

measures of skewness

measures of regression analysis

Q68 ___________ is useful in the comparison of two or more sets of data which are measured in the same

units but differ to such an extent that a direct comparison of the respective standard deviations is not very

helpful

coefficient

variation

coefficient of variation

regression analysis

Q69 Consider the arrayed data, X = 2,5,8,9,12,13,18. Find mean deviation

52.19

9.57

3.796

641.29

Q70 _________ can be said to measure the degree of uniformity of observations in a given set of data

variance

standard deviation

range

variation

Q71 __________ can be an unsatisfactory measure of dispersion because it is affected by extreme values

or items which renders it unrepresentative of majority of the set of data

mean deviation

variance

mean

range

Q72 variables include sex, in religious or party affIliation, genotype, blood group, place of residence know

as _____

ratio scale

nominal scale

ordinal scale

interval scale

Q73 scale has all the properties of the nominal, ordinal and interval scales including the additional

property of having an absolute zero point know as _________

ratio scale

nominal scale

ordinal scale

interval scale

Q74 _________ can be defined as a management tool for making decision. It is also a scientific approach

to presentation of numerical information in such a way that one will have a maximum understanding of

the reality represented by such information.

Quantitative Variable

Statistics

Mathematics

Business

Q75 Government uses _________ as a tool for collecting data on economic aggregates such as national

income, savings, consumption and gross national product

Sample

Population

statistics

agent

Q76 ______________ is a variable whose values are given as numerical quantities

Quantitative Variable

Qualitative Variable

Random Variable

Continuous Variable

Q77 In studying the nutritional well being of pupils in a primary school, the _______ is a pupil in the

school.

entity

Population

sample

variable

Q78 _____________ is a characteristic that assumes different values for different entities

Variable

Population

Random Variable

Sample Variable

Q79 ____________ is the part of the population that is selected for a study

Sample

Continuous

Random

Qualitative

Q80 __________variable that can assume both decimal and non decimal values

Continuous

Population

Random

Discrete