In: Math
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. |
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).