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 at the end of the study, favorable outcomes were observed in 162 patients in the treatment group and 97 patients in the control group.
Did the treatment have an effect, or is this just chance variation? Perform a statistical test, following the steps in Problems.
Problem 1. The null hypothesis is (pick the best among the options):
- The treatment has an effect which could be good or bad.
- The treatment has a good effect.
- The treatment has no effect.
- The treatment has a bad effect.

Problem 2.

Under the null hypothesis, the SE of the difference between the percents of favorable outcomes in the two groups is about _______%.

First one is the treatment has no effect

PROBLEM 3

The z statistic is closest to

0.8 1.0 1.2 1.4 1.6 1.8 2.0

PROBLEM 4
The conclusion of the test is (pick the better of the two options)

The observed difference is due to chance. The treatment has an effect

Problem 2 the answer is 4.5%

You now the correct answer for the problem 7?

Based on the information given, which test should you perform?

binomial test for the fairness of a coin is the right answer

PROBLEM 9 The conclusion of the test is

The treatment had a bad effect. is the right answer

PROBLEM 6

answer is The result is not statistically significant, so we conclude that the sons are taller than their fathers, on average.

thanks joan

PROBLEM 4 the right answer is The treatment has an effect

thx u very much denise

Hey be careful some are given the wrong answer...

Please try understand the exercises...