Solve the following:
Q1. The following data are from an independent-measures experiment comparing two treatment conditions. Do these data indicate a significant difference between the treatments
Treatment one:
13
9
7
11
Treatment two:
9
5
5
9
Q2. A sample of freshmen takes a reading comprehension test and their scores are summarized below. If the mean for the general population on this test is m=12, can you conclude that this sample is significantly different from the population. Test with a=.05 sample scores: 16, 8, 8, 6, 9, 11, 13, 9, 10
Q3. The following data are from two separate samples. Does it appear that these two samples came from the sample or from two different populations?
a. Use an F-max test to determine whether there is evidence for a significant difference between the two population variances. Use the .05 level of significance
b. Use an independent-measures t test to determine whether there is evidence for a significant difference between the two population means. Again, use a=.05
Sample one:
n=10
M=32
SS=890
Sample two:
n=10
M=18
SS=550
Q4. A research study reports t(14)=2.17.
a. How many individuals participated in the study? (how big was the sample?)
b. Is this t statistic sufficient to reject the null hypothesis using a two-tailed test with a = .05?
Q5. The following data were obtained from an independent measures study. Determine if there us a significant difference between the treatments. Use a =.05
Treatment one:
5
1
2
3
4
Treatment two:
6
10
14
12
18