Statistical Inference and Regression Models MCQ part-7

Que.Which of the following condition should be satisfied by function for pmf?
a. The sum of all of the possible values is 1
b. The sum of all of the possible values is 0
c. The sum of all of the possible values is infinite
d. All of the mentioned
Que.Which of the following function is associated with a continuous random variable?
a. pdf
b. pmv
c. pmf
d. all of the mentioned
Que.Statistical inference is the process of drawing formal conclusions from data.
a. True
b. False
c. May be True or False
d. Can’t say
Que.The expected value or _______ of a random variable is the center of its distribution.
a. mode
b. median
c. mean
d. bayesian inference
Que.Point out the correct statement.
a. Some cumulative distribution function F is non-decreasing and right-continuous
b. Every cumulative distribution function F is decreasing and right-continuous
c. Every cumulative distribution function F is increasing and left-continuous
d. None of the mentioned
Que.Which of the following of a random variable is a measure of spread?
a. variance
b. standard deviation
c. empirical mean
d. all of the mentioned
Que.The square root of the variance is called the ________ deviation.
a. empirical
b. mean
c. continuous
d. standard
Que.Point out the wrong statement.
a. A percentile is simply a quantile with expressed as a percent
b. There are two types of random variable
c. R cannot approximate quantiles for you for common distributions
d. None of the mentioned
Que.Which of the following inequality is useful for interpreting variances?
a. Chebyshev
b. Stautaory
c. Testory
d. All of the mentioned
Que.For continuous random variables, the CDF is the derivative of the PDF.
a. True
b. False
c. May be True or False
d. Can’t say

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