I want to study whether or not distractions in the environment impact memory performance. I recruit 25 students to take part in my study and I randomly assign them into one of two groups: a memory task in a distraction free environment or a memory task in an environment where several distractions will be presented. I measure the number of errors that each participant makes in their respective conditions. Test the hypothesis that those in the distracted group will have more errors than those in the no distraction group at an alpha of 0.05 .
a. What is the null hypothesis?
a. mu 1-mu 2=0
b. mu 1-mu 2!=0
c. mu 1-mu 2>0
d. mu 1-mu 2<0
b. What is the alternative hypothesis?
a. mu 1-mu 2=0
b. mu 1-mu 2!=0
c. mu 1-mu 2>0
d. mu 1-mu 2<0
Data:
able[[ able[[Distraction Free Environment],[Number of errors made (group 1)]], able[[Environment with Distraction],[Number of Errors made (group 2)]]],[2,3],[5,5],[2,2],[3,4],[1,6],[2,5],[4,4],[0,4],[2,2],[1,3],[2,5],[0,1],[2,]]
c. What are your total degrees of freedom?
d. What is your critical t value (from the t table)?
e. What is the mean difference?
lo.I want to study whether or not distractions in the environment impact memory performance.I recruit 25 students to take part in my study and I randomly assign them into one of two groups: a memory task in a distraction free environment or a memory task in an environment where several distractions will be presented.I measure the number of errors that each participant makes in their respective conditions. Test the hypothesis that those in the distracted group will have more errors than those in the no distraction group at an alpha of 0.05
a. What is the null hypothesis?
a.1-2=0
b.1 -u2#0
c.1 -2>0
d.1 - 2<0
b. What is the alternative hypothesis?
a. I - 2=0
b.1-20
c.1 -2>0
d.1-2<0
Data:
Distraction Free Environment Environment with Distraction Number of errors made (group 1) Number of Errors made (group 2)
c.What are your total degrees of freedom?
d. What is your critical t value (from the t table)?
What is the mean difference?