Question # 1

Arithmetic operations are carried out by ---------------- unit

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logical

inner

ALU

other

Confidence intervals which are often used in practice are

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90%

95%

98%

all of these

A statistical hypothesis is an assertion or conjecture about the distribution of random variables

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one

two

one or more

three

For normal distribution mean always lies between.

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Median and mode

Median and Q₁

Median and Q₃

None of these

The sample size n is reasonably large so that for each cell, the estimated expected frequency must be at least

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2

3

4

5

Keyboard, mouse and scanner are the ---------- devices

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input

output

logical

mini

A ---------------- error is made by accepting H_o if H₁ is actually true

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type - I

type - II

type - III

type - IV

If any ultimate class frequency is negative the data will be

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inconsistent

consistent

correlated

composite

Increase the number of patients in the hospital due to heel stock is:

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Seasonal trend

Secular trend

Cyclical movements

Irregular variation

The _______ regression line always passes through (X̅, y̅).

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Opposite

Estimated

Estimates

Random

A characteristic which varies in quality from one individual to another is called an_______.

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Variable

Attribute

Associated

Independent

The rise and fall of a time series periods longer than one- year is called.

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Secular trend

Seasonal variation

Cyclical variation

Irregular variation

The process of making estimates about the population parameter from a sample is called:

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Statistical independence

Statistical inference

Statistical hypothesis

Statistical decision

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b_yx

b_xy

S_p

The difference of upper and lower limits of confidence interval measures the

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level of significance

level of confidence

interval

precision

The power of the test is equal to:

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α

1 - α

β

1 - β

In simple linear regression, the number of unknown constants are:

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Two

Three

Four

Five

The graph of a time series is called

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histogram

polygon

straight line

historigram

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