# statistics

posted by .

suppost we wanted to test the hypothesis that control a group of cancer patients(group 1) would report higher mean pain ratings than an experimental group recieving special message treatment(group 2). Use the following information, Compute at a t-statistice for independent group;
mean group 1=78.5 s(square/1)=42.1 and n(1)=25
mean group 2=72.1 s(square2/2)=39.7 and n(2) =25

• statistics -

Use an independent groups t-test for your two samples. n1 + n2 - 2 degrees of freedom is used for this test. Use a t-table to determine your cutoff or critical value to reject the null (you should have a significance level set for the test). If your test statistic exceeds the critical value from the table, reject the null and conclude a difference. If the test statistic does not exceed the critical value from the table, do not reject the null. You cannot conclude a difference in this case.

I hope this will give you a few hints to get started on your problem.

## Similar Questions

1. ### statistics

Would this be 2 tailed test or a 1 tailed test?
2. ### sattistics

Twenty students randomly assigned to an experimental group receive an instructional program: 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test(with …
3. ### Statistic

18. Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the …
4. ### psychology

In an experiment, a control group is different from an experimental group in that the people in the control group: are not exposed to the same treatment of the independent variable. differ in trait variables. do not incur the same …
5. ### Physical Science

Four groups of rats are tested in a lab. Group 1 is given a special hornmone for muscle growth. Group 2 is given a special multivitamin diet. Group 3 receives both the hormone treatment and the multivitamin diet. Group 4 does not receive …
6. ### Physical Science

Four groups of rats are tested in a lab. Group 1 is given a special hornmone for muscle growth. Group 2 is given a special multivitamin diet. Group 3 receives both the hormone treatment and the multivitamin diet. Group 4 does not receive …
7. ### Statistics

In a study of the effect of a medical treatment, a simple random sample of 300 of the 500 participating patients was assigned to the treatment group; the remaining patients formed the control group. When the patients were assessed …
8. ### statistics

In a study of the effect of a medical treatment, a simple random sample of 300 of the 500 participating patients was assigned to the treatment group; the remaining patients formed the control group. When the patients were assessed …
9. ### statistics

In a study of the effect of a medical treatment, a simple random sample of 300 of the 500 participating patients was assigned to the treatment group; the remaining patients formed the control group. When the patients were assessed …
10. ### Statistics

In a study of the effect of a medical treatment, a simple random sample of 300 of the 500 participating patients was assigned to the treatment group; the remaining patients formed the control group. When the patients were assessed …

More Similar Questions