Question on hypothesis testing of mean and variance

Assignment Help Basic Statistics

Reference no: EM13109708

1. 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:

Treatment two:

2. 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

3. 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

4. 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?

5. 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:

Treatment two:

Please show all work.

Reference no: EM13109708

Questions Cloud

Analyze bps efforts to improve sustainability : Based on the history of the company, why did BP get involved in so much questionable conduct? Analyze BPs efforts to improve sustainability. Do you think they are sufficient, or does the company need to do more?

Is number of years experience less than claim : In the study of 15 taxi drivers, average experience was 11.2 years. Standard deviation was 2. At α = .10, is number of years' experience of taxi drivers really less than taxi company claimed?

Ethical implications in organizational reality : You must ponder on an organization's responsibility to its workers whose skills have become obsolete. Considering the rapid pace of technological change.

Why researcher selected random sample to test claim : Found mean number of sticks of gum chewed per day was 9. Standard deviation of population is 1. At α = .05, is number of sticks of gum person chews per day actually is greater than 8?

Question on hypothesis testing of mean and variance : The following data are from an independent-measures experiment comparing two treatment conditions. Do these data indicate a significant difference between the treatments

Determine the minimum cycle time : As part of a major plant renovation project, the industrial engineering department has been asked to balance a revised assembly operation to achieve an output of 240 units per eight-hour day.

Calculate the percentage idle time for the line : Balance the line using the largest positional weight heuristic. Break ties with the most following tasks heuristic. Use a cycle time of 50 seconds.

Statistical test to examine differences in attitudes : Suppose you are testing the differences in attitudes toward health care reform using Democrats, Republications, and Independents. What statistical test would you use?

Define level of proof-technical definition of alpha : What is the technical definition of alpha? When might a "high level of proof" be required in business? Why does a "high level of proof" mean a small value of alpha?

User Account

All Pages