Business Statistics and Research Methods MCQs

Find out the value of the median from the following frequency

Size of Items	8	10	12	14	16	18	20
Frequency	3	7	12	28	10	9	6

Statement I: The absolute value of the difference between an unbiased estimate and the corresponding population parameter is called sampling error.
Statement II: Multi-stage sampling is a restricted non-probability based sampling technique.

Arrange the following statements in sequence for applicability of Chi-square test.
1. Observations are recorded and samples are collected on a random basis.
2. Check whether all the members in the sample must be independent.
3. Check that no group contain items less than 10 otherwise regrouping needs to be done.
4. Check that are constraints are linear.

A coin is biased so that its chances of landing Head is 21.3. If the coin is flipped 3 times, the probability that the first 2 flips are heads and the 3^rd flip is a tail is:

The application of x²-test as parametric test will be in which one of the following situations?

Which of the following statement is correct?
i. In the creation of index only representative times are selected
ii. If the price of wheat increases by 50% and the price of salt decreases by 50%, the CPI will remain unchanged

Assertion (A): If regression coefficient of X on Y is greater than one, regression coefficient of Y on X must be less than one.
Reason (R): The geometric mean between two regression coefficients is the coefficient of correlation.

Standard error of number of successes is given by:

Mean and variance of poisson distribution is equal to