Business-Statistics-and-Research-Methods MCQs

Commerce Objective Questions

Home / Commerce / Business-Statistics-and-Research-Methods

631. In least squares regression, which of the following is not a required assumption about the error term E?

A. The expected value of the error term is one

B. The variance of the error term is the same for all values of x

C. The values of the error term are independent

D. The error term is normally distributed

632. The measurement based on all the values in the series is

B. Standard deviation

C. Quartile deviation

D. All of these

633. In . . . . . . . ., selection of sample items is independent of the person making the study.

A. probability sampling

B. non-probability sampling

C. Both A and B

D. Neither A nor B

634. If the value of coefficient of determination is 0.64, what is the value of coefficient of correlation?

635. The difference of two means in case of small samples is tested by the formula:

A. $$t = \frac{{\overline {{x_1}} - \overline {{x_2}} }}{S}$$

B. $$t = \frac{{\overline {{x_1}} - \overline {{x_2}} }}{S}\sqrt {\frac{{{n_1} + {n_2}}}{{{n_1} - {n_2}}}} $$

C. $$t = \frac{{\overline {{x_1}} - \overline {{x_2}} }}{S}\sqrt {\frac{{{n_1} - {n_2}}}{{{n_1} + {n_2}}}} $$

D. None of these

636. Which of the following is not a type of non-probability sampling as it seems to be more objective in nature?

A. Snowball sampling

B. Stratified random sampling

C. Quota sampling

D. Convenience sampling

637. The listing of the possible outcomes of an experiment and their corresponding probability is called:

A. Random Variable

B. Contingency table

C. Bayesian Table

D. Probability Distribution

Page 91 of 165

« 89 90 91 9293 »