# statistics

posted by Rald

If a teacher wants to test her belief that more than 5 students in college classes typically receive A as a grade, she'll perform?
a. two tailed testing of a mean
b. two tail testing of a proportion
c. one tail testing of a proportion
d. one tail testing of a mean

I choose b..is this correct???

1. Kuai

You are testing one tail.

2. Anonymous

The time spent (in days) waiting for a heart transplant in two states for patients with type A+ blood can be approximated by a normal distribution, as shown in the graph to the right. mean of =128 Standard deviation of=23.3

## Similar Questions

1. ### Statistics

1) For each of the following statements, formulate appropriate null and alternative hypotheses. Indicate whether the appropriate test will be one-tailed or two-tailed,then sketch a diagram that shows the approximate location of the …
2. ### statistics

1.test wheter these samples represent populations that are different from the general population- sample of 10 with a mean of 44 and sample of 1 with a mean of 48. 2. The general population of individuals has a mean of 40 , a deviation …

How can you determine if you are using a two tailed test vs a one tailed test?
4. ### Statistics

Suppose that the average grade for all people who take this course in statistics is 83 with a standard deviation of 3.5. If your particular class has an average of 89, can you conclude that your class is better than average at the …
5. ### statistics

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with …
6. ### Science

A repair shop tested two methods(a & B) of replacing a broken roller. In testing method A, these times in minutes were measured (5 trials), 2,4,9,3,2. In testing methods B, these times in minutes were measured (6 trials), 3,7,5,8,4,3. …
7. ### statistics

A teacher wants to compare the mean geology scores of two different classes. She is testing the null hypothesis that there is no difference in the population mean scores of the two classes. The difference of the sample means is 51.4. …
8. ### Statistics

so we will be having a quiz about hypotheses testing and i cant still figure out the difference between the null hypothesis with alternative hypothesis. PLEASE HELP ME DIFFERENTIATE THE TWO. And i still get confused between one tailed …
9. ### math/stats

Which of the following statements are true?
10. ### statistics

H0 is p = 0.45 and H1 is p ≠ 0.45. What type of test will be performed?

More Similar Questions