ACET (Actuarial Common Entrance Test) Statistics: Questions 60 - 63 of 81

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Question number: 60

» Measures of Spread » Variance

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MCQ▾

Question

The average of squared deviations from mean is called:

Choices

Choice (4)Response

a.

Range

b.

Coefficient of Variation

c.

Standard Deviation

d.

Variance

Question number: 61

» Types of Data » Histogram,

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Question

If vertical lines are drawn at every point of straight line in frequency polygon, then by this way frequency polygon is transformed into

Choices

Choice (4)Response

a.

Histogram

b.

Width diagram

c.

Length diagram

d.

Dimensional bar charts

Question number: 62

» Combinatorial Probability

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Question

How many three-digit numbers can be formed by using the digits 1 to 9 if repetitions of digits are not allowed?

Choices

Choice (4)Response

a.

500

b.

72

c.

504

d.

3024

Question number: 63

» Discrete Random Variables » Standard Deviation

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Question

Which of the following statements relating to the correlation & regression is NOT true?

Choices

Choice (4)Response

a.

The probable error of the coefficient of correlation is 0.6745 times of its standard error

b.

The coefficient of correlation between the two variables is the arithmetic average of the two regression coefficients

c.

Coefficient of correlation multiplied by the ratio between the standard deviations of the two variables denotes the slope of the regression line.

d.

The coefficient of correlation is independent of change of origin and scale.

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