Question 3 of 25 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)
A high school senior wonders if being blindfolded affects a person’s typing accuracy. He randomly selects 17 students from his large school. For one of the treatments, the senior reads a statement to each student and asks them to type it while wearing a blindfold. For the other treatment, the student is asked to type a similar statement without wearing a blindfold. The order of treatments is determined with the flip of a coin. The mean difference (blindfolded – not blindfolded) in the number of correct words is 6.12 words with a standard deviation of 5.98 words.
Answer
A
Because the P-value is less than α, there is evidence of a difference, on average, in typing accuracy while wearing a blindfold and not wearing a blindfold.
B
Because the P-value is greater than α, there is evidence of a difference, on average, in typing accuracy while wearing a blindfold and not wearing a blindfold.
C
Because the P-value is less than α, there is not sufficient evidence of a difference, on average, in typing accuracy while wearing a blindfold and not wearing a blindfold.
D
Because the P-value is greater than α, there is not sufficient evidence of a difference, on average, in typing accuracy while wearing a blindfold and not wearing a blindfold.