## 2017_2 TMA Solutions: STT206 - Statistics for Management Sciences II

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### 2017_2 TMA Solutions: STT206 - Statistics for Management Sciences II

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1 The values of (xi,yi) are given as (1,2), (2,4), (3,8), (4,7), (5,10), (6,5), (7,14), (8,16), (9,2), (10,20) find the value of summation yi

88

2 The values of (xi,yi) are given as (1,2), (2,4), (3,8), (4,7), (5,10), (6,5), (7,14), (8,16), (9,2), (10,20) find the value of summation xi

55

3 A graphical method of showing correlation between two variables is called

scatter diagram

4 When the correlation coefficient r, equals zero, then

there􀳦??s no correlation

5 Correlation values ranges from

-1 to 1

6 The following are types of correlation except

7 Distributions involving two discrete variables are called

bivariate distributions

8 Distributions in which there are only one variable are called

univariate distributions

9 Data collected on a particular variable or set of variables over time is called

Time Serie s Data

10 Compute the harmonic mean of 5, 6 and 7

5,58

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### Re: 2017_2 TMA Solutions: STT206 - Statistics for Management Sciences II

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1 The second quartile is equivalent to the

median

2 The boundaries separating the items in a given distribution into quarters are called

quartiles

3 What is the range of the data 5, 2, 2, 3, 7, 8, 18, 1 ?

17

4 The difference between the highest observation and the lowest observation is called

the range

5 The following are measurement scales except

interval

6 Variables whose values are fractional and are points on an internal are called

continuous variab les

7 Variables whose values are whole numbers or integers are called

whole variables

8 Quantitative variable can be classified into

discrete variable
continuous varia ble
***all of the above
none of th e above

9 A bus starts with 6 people and stops at 10 different stops, how many different ways can the 6 people depart if any passenger can depart at any bus stop ____

1000000

10 Any characteristics of an object that is capable of assuming different values is called

variable

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Posts: 1898
Joined: Thu Aug 10, 2017 2:00 am
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### Re: 2017_2 TMA Solutions: STT206 - Statistics for Management Sciences II

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1 The values of (xi,yi) are given as (1,2), (2,4), (3,8), (4,7), (5,10), (6,5), (7,14), (8,16), (9,2), (10,20) find the value of summation yi

88
\
2 The values of (xi,yi) are given as (1,2), (2,4), (3,8), (4,7), (5,10), (6,5), (7,14), (8,16), (9,2), (10,20) find the value of summation xi

55

3 A graphical method of showing correlation between two variables is called

scatter diagram

4 When the correlation coefficient r, equals zero, then

there􀳦??s no correlation

5 Correlation values ranges from

-1 to 1

6 The following are types of correlation except

7 Distributions involving two discrete variables are called

bivariate distributions

8 Distributions in which there are only one variable are called

univariate distributions

9 Data collected on a particular variable or set of variables over time is called

Time Serie s Data

10 Compute the harmonic mean of 5, 6 and 7

5,58

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Posts: 1898
Joined: Thu Aug 10, 2017 2:00 am
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### Re: 2017_2 TMA Solutions: STT206 - Statistics for Management Sciences II

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1 Calculate the standard deviation of the date in the table below

0.91

2 Calculate the variance of the date in the table below

0.84

3 Calculate the mean of the date in the table below

1.96

4 A graphical method of showing correlation between two variables is called

scatter diagram

5 Distributions involving two discrete variables are called

univariate distribution s

6 Distributions in which there are only one variable are called

univariate distribution s

7 Classification of data based on sources gives rise to

primary data
secondary da ta
***all of the above
none of th e abo ve

8 The first moment about mean is given by $H_{1}=$

$\frac{\sum fi x^{2}}{N}$

9 Given the data, 5, 8, 3, 4, 6, 1. Obtain first noncentral moment

4.5

10 Consider a set of data on monthly sales of a company􀳦??s product, the mean of which was found to be N240,000; the mode found to be N135,000; and the standard deviation found to be N85,000. Calculate Coefficient of skewness

1.24

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