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Two coins are tossed simultaneously. What is the probability of getting exactly one
head ?

A) 0.25 B) 0.5 C) 0.75 D) 0

In which approach to probability the outcomes are equally likely to occur ?
A) Classical approach B) Subjective approach
C) Relative frequency approach D) Axiomatic approach

The chance that a ship safely reach a port is 0.20. What is the probability that out of
3 ships expected, no ship would arrive safely ?
A) 0.80 B) 0.512 00 0) 0.488

Which among the following is true for a Poisson distribution ?
A) Mean = Variance B) Mean > Variance
C) Mean < Variance D) Mean = Standard deviation

If the points in a scatter diagram show a downward trend from the left top to the right
bottom, the correlation is

A) Positive B) Negative

C) Zero D) None of the above

If correlation coefficient = 0.8, coefficient of determination is
A) 80% B) 8% C) 0.8% D) 64%

Sampling error is present in

A) Census survey

B) Sample survey

C) Both Census and Sample survey
D) Neither Sample nor Census survey

What is the critical value for a two-tailed hypothesis test on a population mean when
level of significance is 5% and the population standard deviation is known ?

A) 2.58 B) 2.33 C) 1.96 D) 1.645

Large sample theory is applicable when the sample size is
A) More than 30 B) Less than 30 C) Equal to 30 D) Atleast 100

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