Free Printable Phronesis Mind Inter School - English Medium

1.

Which of the following statement is true?

a)

Both sampling errors and non-sampling errors can be controlled by employing more supervisors.

b)

Z chart is used for presenting the observed data, cumulative data and totals in the same chart.

c)

The non-response rate in the mailed questionnaire method is usually higher than that of personal interview method.

d)

A questionnaire is a form containing a set of questions filled out by an interviewer.

2.

Which of the following statement is false?

a)

A histogram cannot be constructed for a frequency distribution with unequal size class intervals.

b)

Square space which covering a single bar of the histogram is always proportional to the frequency of specific class interval.

c)

In the case of Z chart Moving annual summations curve is creatively depicts the long term trend of the variable

d)

Most probably discrete data may not have decimal or fraction values.

3.

What is the most suitable chart to represent the A/L results of Business statistics in the year 2016 with the relative contribution of each grade as A, B, C, S, F.

a)

Pictogram

b)

Line chart

c)

Pie chart

d)

Component bar chart

4.

Bowley’s coefficient of skewness of these data 12, 14, 14, 16, 17, 18, 19, 21, 21, 23, 25 is:

a)

-1/7

b)

1/7

c)

-1/3

d)

1/3

5.

Which of the following is not a merit of the variance?

a)

Variance used each or more elements to calculate the specific measure of dispersion.

b)

Variance destroys the reality of the unit of measurement since they were squared.

c)

Combined variation can be calculated using the variance.

d)

Variance has the theoretical qualities which can use for the purpose of inference.

6.

If the mean deviation of a moderately skewed distribution is 8, find the value of standard deviation?

a)

10

b)

64

c)

16

d)

None of above

7.

If the sum of squares of the deviations of 10 observations from mean 60 is 360, then the coefficient of variation is ………..

a)

60%

b)

10%

c)

36%

d)

6%

8.

Which of the following statement is true?

a)

If the regression coefficient of Y on X is positive, the correlation coefficient between X and Y is also positive.

b)

The rank correlative coefficient can be obtained by calculating the product movement correlative coefficient between original data of ranks.

c)

The least square method is based on the assumption that the summation of squared values of the difference between the observed values and the errors is minimum.

d)

The summation of the observed values of Y is less than the summation of the fitted values of Y.

9.

If

P\ =\ Y\ +\ 32,\ \ Q=\ \frac{X}{-5},\ and\ P\ =\ 42\ +Q

what is the equation of Y on X ?

a)

Y = 32 + 0.5 X

b)

Y = 32 - 0.5 X

c)

Y = -10 + 0.2 X

d)

Y = 10 - 0.2 X

10.

The coefficient of correlation between X and Y with 40 pair of observations is 0.82. If the value of 2.5 is added to each value of X and the value of 5 is added to each value of Y, then the original value of correlation coefficient will,

a)

Decrease by 50%

b)

Remain unaffected

c)

Increased by 50%

d)

None of above.

11.

If R and Q are two events with

P\left(R\cup Q\right)\ =\ \frac{5}{6},\ P\left(R\cap Q\right)'\ =\ \frac{2}{3}\ and\ P\left(R'\right)\ =\frac{1}{2}

then,

a)

R and Q are mutually exclusive events.

b)

R and Q are dependent events.

c)

R and Q are independent events.

d)

None of above

12.

If X is a random variable which has E (3X + 2) = 8 and Var (4 - 2X) = 12, find the mean and variance of X,

a)

3 and 2

b)

2 and 3

c)

3 and -2

d)

-2 and 3

13.

X has distributed in Poison distribution with P(X = 2) = P (X = 3), find the variance of that distribution.

a)

2

b)

3

c)

6

d)

4

14.

Find the positively skewed distribution.

a)

Binomial distribution with n = 15, P = 0.8

b)

Binomial distribution with n = 10, P = 0.9

c)

Binomial distribution with $\mu\ =\ 2,\ \sigma^2\ =\ 1.6$

d)

Binomial distribution with $\mu=0,\ \sigma^2=\ 9$

15.

Which of the following statements is false?

a)

In systematic sampling N/n is called as ‘sampling interval’

b)

The finite population correction factor may be ignored when it is closed to zero.

c)

Non-response error cannot be reduced by increasing the sample size.

d)

The field cost of cluster sampling is usually larger than that of simple random sampling.

16.

Rama’s bridge in Sri Lanka is also known by which Biblical name?

a)

Adam’s Bridge

b)

St. Mary’s Bridge

c)

Bridge to Heaven

d)

St. Peter’s Bridge

17.

Who has shifted the capital from Kurunegala to Gampola in ancient Sri Lanka?

a)

King V Prakramabahu

b)

King V Vijayabahu

c)

King IV Buwanaikabahu

d)

King V Buwanaikabahu

18.

Joe Biden who is the winner of the 2020 US presidential election, is the ................. President from the Democratic Party.

a)

21st

b)

46th

c)

40th

d)

25th

19.

Identify this person who is the author of the book titled “The God of small things”

a)

Arundhati Roy

b)

Sobha Devi

c)

Pupul Jayakar

d)

Shekhar Kapoor

20.

What is the name of the anti-corona drug product approved by the National Drug Regulatory Authority for emergency use in Sri Lanka?

a)

Sputnik V

b)

Oxford Astrazeneca

c)

Pfizer BioNTech

d)

Moderna

21.

The day after, the day after tomorrow is four days before Monday. What day is it today?

a)

Friday

b)

Wednesday

c)

Thursday

d)

Monday

22.

There are three times higher the number of monkeys compared to elephants in a zoo. If the total of elephants and monkeys are 88, how many monkeys are there in the zoo?

a)

65

b)

66

c)

22

d)

24

23.

If 30 men working 7 hours per day can do a piece of work in 18 days, in how many days will 21 men working 8 hours a day do the same work?

a)

30 days

b)

22.5 days

c)

24 days

d)

45 days

24.

Nethmi is 21 years old and her sister is one-third of Nethmi’s age. When Nethmi is 36, what will be the age of her sister?

a)

22 years

b)

12 years

c)

29 years

d)

14 years

25.

Most Suitable number for the blank is,

a)

5

b)

2

c)

6

d)

4

Phronesis Mind Inter School - English Medium - (C_01)

Total questions: 25

Worksheet time: 17mins

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