Category: Statistics MCQs FPSC NTS PPSC Past Papers Test Questions

Statistics MCQs quiz test questions with answers for FPSC CSS NTS PPSC SPSC KPPSC test preparation, including questions from statistics past papers. Basic statistics and probability MCQ solved questions and answers.

What is the purpose of a box plot in statistics?

(A) To display the distribution of a dataset
(B) To identify outliers in a dataset
(C) To compare the means of two datasets
(D) To calculate the standard deviation of a dataset

The answer is: (A) To display the distribution of a dataset

In hypothesis testing, what does a p-value represent?

(A) The probability of making a Type I error
(B) The probability of rejecting the null hypothesis when it is true
(C) The probability of obtaining the observed results or more extreme results if the null hypothesis is true
(D) The probability of obtaining a sample mean equal to the population mean

The answer is: (C) The probability of obtaining the observed results or more extreme results if the null hypothesis is true

In a statistical experiment, what does the term “random sampling” refer to?

(A) Selecting individuals who are representative of the entire population.
(B) Choosing a sample in such a way that every member of the population has an equal chance of being selected.
(C) Collecting data from a small subset of the population.
(D) Selecting data points based on convenience.

The answer is: (B) Choosing a sample in such a way that every member of the population has an equal chance of being selected.

What does the term “statistical power” refer to in hypothesis testing?

(A) The probability of making a Type I error.
(B) The probability of correctly rejecting the null hypothesis when it is false.
(C) The probability of obtaining a significant result when the null hypothesis is true.
(D) The probability of obtaining a non-significant result when the null hypothesis is false.

The answer is: (B) The probability of correctly rejecting the null hypothesis when it is false.