ACET (Actuarial Common Entrance Test) Statistics: Questions 123 - 127 of 201

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Question number: 123

» Continuous Distributions » The Normal Distribution

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MCQ▾

Question

If then mean of

Choices

Choice (4)Response

a.

41

b.

40

c.

21

d.

9

Question number: 124

» Types of Data » Histogram

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MCQ▾

Question

If you have data on house prices and the distance of each of those houses from the city centre, and you are curious whether there is an association between distance from the city centre and the price of the house, with which of the following graphical techniques could you most easily see whether there is indeed such a relationship?

Choices

Choice (4)Response

a.

a bimodal histogram

b.

a scatter diagram

c.

Two histograms, one of house prices and one of distance from city centre

d.

a bar graph with distance on the X axis

Question number: 125

» Correlation and Regression » Correlation Coefficient

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MCQ▾

Question

If the relationship between two variables X and Y is given by 2x + 3y + 4 = 0, then the value of the correlation coefficient between x and y is

Choices

Choice (4)Response

a.

1

b.

-1

c.

Negative

d.

0

Question number: 126

» Probabilities » Conditional Probabilities

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Question

If A and B are two independent events such that then will be

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 127

» Discrete Distributions » Poisson

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MCQ▾

Question

If the standard deviation of a Poisson variable X is , then the probability that X is strictly positive is

Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

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