Designing and Implementing a Data Science Solution on Azure — Question 49

You have been tasked with ascertaining if two sets of data differ considerably. You will make use of Azure Machine Learning Studio to complete your task.
You plan to perform a paired t-test.
Which of the following are conditions that must apply to use a paired t-test? (Choose all that apply.)

Answer options

• A. All scores are independent from each other.
• B. You have a matched pairs of scores.
• C. The sampling distribution of d is normal.
• D. The sampling distribution of x1- x2 is normal.

Correct answer: B, C

Explanation

The correct answer includes B and C because a paired t-test requires matched pairs of scores to ensure that the comparison is valid, and the sampling distribution of the differences must be approximately normal. Option A is incorrect as the scores should be dependent due to the pairing, and option D is not applicable since it refers to independent samples rather than paired samples.