Bcom Bachelor of Commerce Business Statistics

Question 1

Which measure of central tendency is most affected by extreme outliers?

Accepted Answer

Mean

Answer

The mean sums all values and divides by count, so a single extreme value can dramatically shift it, unlike the median which uses positional ranking.

Question 2

What does 'standard deviation' measure?

Accepted Answer

The average spread of data points from the mean

Answer

Standard deviation quantifies how much individual data points typically deviate from the mean, measuring the dispersion or variability in a dataset.

Question 3

In hypothesis testing, what is the 'null hypothesis' (H₀)?

Accepted Answer

A statement of no effect or no difference that the test attempts to reject

Answer

The null hypothesis posits no relationship or effect exists; researchers gather evidence to determine whether it can be statistically rejected.

Question 4

What is a 'p-value' in statistical testing?

Accepted Answer

The probability of observing the test result, or more extreme, assuming the null hypothesis is true

Answer

A p-value measures how likely the observed data would occur by chance if the null hypothesis were true; a small p-value suggests the result is statistically significant.

Question 5

Which type of data can only take specific, separate values (e.g., number of customers)?

Accepted Answer

Discrete data

Answer

Discrete data consists of countable, distinct values with no intermediate possibilities—like the number of defective products in a batch.

Bcom Bachelor of Commerce Practice Test

Bcom Bachelor of Commerce Practice Test

Bcom Bachelor of Commerce Business Statistics