Question

In: Math

1. Which of the following is not a characteristic of the normal probability distribution? a. The...

1. Which of the following is not a characteristic of the normal probability distribution?

a.

The distribution is symmetrical

b.

The mean of the distribution can be negative, zero, or positive

c.

The standard deviation must be 1

d.

The mean, median, and the mode are equal

2. If , n = 12, and the slope equals 0.5, then the y-intercept of the least squares line is b0 = 276.08.

True

False

3. The coefficient of correlation r is a number that indicates the direction and the strength of the linear relationship between the dependent variable y and the independent variable x.

True

False

4. The function that defines the probability distribution of a continuous random variable is a

a.

uniform function.

b.

normal function.

c.

either normal of uniform depending on the situation.

d.

probability density function.

Solutions

Expert Solution

Answers)

1) Which of the following is not a characteristic of the normal probability distribution

A) Options a) c) and d) are characteristic of the normal probability distribution ,except option B

2)If , n = 12, and the slope equals 0.5, then the y-intercept of the least squares line is b0 = 276.08.

A) True

3)The coefficient of correlation r is a number that indicates the direction and the strength of the linear relationship between the dependent variable y and the independent variable x

A) False .Because the definition of coefficient of correlation 'r' is a number that measures strength and direction of a linear relationship between two variables.

4)The function that defines the probability distribution of a continuous random variable is a

A)The above definition represents the probability density function (Option -D).


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