Question # 1

Statistical inference can be divide into,,,,,,,,,,,,approches

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Four

Three

Two

None

The harmonic mean of two numbers a and b is:

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2ab/ a+ b

2 / a +b

ab / a + b

a + b/ ab

If the null hypothesis is true the probability error is identified by what name

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b

1- b

a

1- a

Standard deviation is calculated from H.M

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Always

Never

Often

None of these

By decreasing ×̅ the length of confidence interval for m

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Increases

Decreases

No effect

None of these

Which of the following cannot be null hypothesis:

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qΣ q

q³ q

q = q

q¹ q

The average value of the lower and upper limits of a class is called:

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Class boundry

Class frequency

Mid point

Class interval

In symmetrical distribution if Q₁ = 4, Q₃ = 12 then median is

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4

16

8

Zero

The graph of time series is called:

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Histogram

Ogive

Straight line

Historigram

If any ultimate class frequency is negative the data will be

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Inconsistent

Consistent

Correlated

The value of the data lying between Q₁ and Q₃ are

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50%

25%

75%

None of these

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NAT I General Science Statistics MCQs With Answers

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