Business Statistics and Research Methods MCQs

Tools for collecting primary data is/are

The standard deviation of the sampling distribution of the mean is called:

The sum of deviations taken from the arithmetic mean of a series is

The total of all the observations divided by the number of observations is called:

The function of statistics is

Match the following items of List-I and List-II with regard to hypothesis-testing and indicate the option of correct matching. List-I List-II a. The ability of test to reject the null hypothesis when it is false. 1. Level of significance b. The probability of accepting a false null hypothesis. 2. Type I error c. The probability of rejecting a true null hypothesis due to sampling error. 3. Type II error d. The probability of rejecting a true null hypothesis. 4. Power of a test

Stratified random sampling is preferred when the parent population is found to be . . . . . . . . with respect to the characteristics under study.

Binomial distribution will be negatively skewed when

A researcher wants to test the significance of the difference between the average performance of the two small sized samples when the information of the population standard deviation is not available, which one of the following hypothesis-testing is suitably used?