Question

Measurements of weight (kg) were taken for a sample of fish. The gender (male or female) of each fish was also recorded.

The most appropriate technique to explore whether there is a difference in the mean weights of fish between males and females would be:

Select one:
a. 1 sample t-test
b. 2 sample t-test.
c. paired-sample t-test
d. testing for two proportions
e. 1 sample z-test

Answer 1

Measurements of weight (kg) were taken for a sample of fish. The gender (male or female) of each fish was also recorded.

The most appropriate technique to explore whether there is a difference in the mean weights of fish between males and females would be: Option (b): 2 sample t-test.

• The two-sample t-test is one of the most commonly used hypothesis tests to compare whether the average difference between two groups is really significant.
• The given condition is to test whether there is a significant difference in the mean weights of fish between two different groups (males and females). Thus two sample t test is most appropriate.