A study is conducted to determine the effect of different doses of a cold medication on reaction times. In a study of 20 participants between 20 and 25 years of age, half were given a single dose of medication and the other half were given two doses. Thirty minutes after dosing, a simple mechanical experiment measured subject reaction time in milliseconds. The results are summarized below. Calculate the 95% confidence interval for the difference in reaction times for these two groups. Assume that the reaction times are normally-distributed and that the treatments were randomly assigned.
A)(-351, 12)
B)(-326, -14)
C)(-385, 46)
D)(-201, -28)

Question

A study is conducted to determine the effect of different doses of a cold medication on reaction times. In a study of 20 participants between 20 and 25 years of age, half were given a single dose of medication and the other half were given two doses. Thirty minutes after dosing, a simple mechanical experiment measured subject reaction time in milliseconds. The results are summarized below.  Calculate the 95% confidence interval for the difference in reaction times for these two groups. Assume that the reaction times are normally-distributed and that the treatments were randomly assigned.
A)(-351, 12) 
B)(-326, -14) 
C)(-385, 46) 
D)(-201, -28)

Quizplus · Accepted Answer

The Answer of A study is conducted to determine the effect of different doses of a cold medication on reaction times. In a study of 20 participants between 20 and 25 years of age, half were given a single dose of medication and the other half were given two doses. Thirty minutes after dosing, a simple mechanical experiment measured subject reaction time in milliseconds. The results are summarized below.  Calculate the 95% confidence interval for the difference in reaction times for these two groups. Assume that the reaction times are normally-distributed and that the treatments were randomly assigned.
A)(-351, 12) 
B)(-326, -14) 
C)(-385, 46) 
D)(-201, -28)

A Study Is Conducted to Determine the Effect of Different