Business Statistics and Research Methods MCQs

Question 1

When it comes to the precision of research estimates, which of the following is true?

Accepted Answer

Non-sampling error can affect validity of results

Answer

Statistical formulae can measure non-sampling error

Answer

A reliable measure is always valid

Answer

Non-sampling error can affect reliability of results

Question 2

Which among the following is not a technique of business forecasting?

Accepted Answer

Correlation Analysis

Answer

Trend Analysis

Answer

Time Series Analysis

Answer

Regression Analysis

Question 3

Which one of the following is a false statement?

Accepted Answer

Coefficient of correlation is independent of origin but not of scale

Answer

The signs of the regression coefficients are always the same

Answer

Correlation coefficient is the geometric mean of the two regression coefficients

Answer

The co-variance between two variables divided by the product of their standard deviations produces the value of coefficient of correlation

Question 4

Correlation obtained by concurrent deviation method indicate only following result.

Accepted Answer

Direction of co-changes

Answer

Degree of co-changes

Answer

Direction and degree of co-changes

Answer

None of the above

Question 5

Co-variance between two variables is:

Accepted Answer

The average of the product of deviations taken from their averages

Answer

A is further divided by the product of their standard deviations

Answer

A is further divided by the product of their arithmetic averages

Answer

None of the above

Question 6

For symmetrical distribution which of the following is true?

Accepted Answer

Median - Q1 = Q3 - Median

Answer

Mode - Q1 = Q3 - Median

Answer

Mean - Q1 = Q3 - Mode

Answer

None of the above

Question 7

When two regression coefficients bear same algebraic signs, then correlation coefficient is:

Accepted Answer

According to two signs

Answer

Positive

Answer

Negative

Answer

Zero

Question 8

F-test is used to test the significance of the differences between/among:

Accepted Answer

Both B and C

Answer

Two sample mean

Answer

More than two samples mean

Answer

Variance of two samples

Question 9

Which of the following is an assumption of one-way ANOVA comparing samples from three or more experimental treatments?

Accepted Answer

All of the above

Answer

The samples associated with each population are randomly selected and are independent from all other samples

Answer

The response variable within each of the k populations have equal variances

Answer

All the response variables within the k populations follow a normal distribution