Question

let d be the difference in the number of puzzles solved by two randomly selected subjects in a 5-minute period. what is the standard deviation of d?

Answer 1

The standard deviation of d cannot be calculated with the given data.

Step-by-step explanation:

To find the standard deviation of d, which is the difference in the number of puzzles solved by two randomly selected subjects in a 5-minute period, we need to know the standard deviation of the number of puzzles solved by one subject.