Saturday

February 28, 2015

February 28, 2015

Posted by **simi** on Thursday, November 5, 2009 at 1:04pm.

a sample of n=9 indivividuals was selected from a normally distributed pop. with a mean of M=25 and a standard deviation of 6.a treatment was administered to the sample, and treatment , the nine individuals produced the following score: 36,27,30,33,22,30,30,24,38

-use a hypothesis test with alpha=.05 to determine whether the treatment had a significant effect. the value for Z in this instant is?

this is what i did:

-i calculated the mean for the sample, which was 30.

-then i used the formula 30-25/2=2.5

-the critical value(two-tailed, alpha .05) for Z in this instance is +/- 1.96

is this correct?

- statistics -
**MathGuru**, Thursday, November 5, 2009 at 8:05pmLooks OK!

**Answer this Question**

**Related Questions**

statistics - A specific study found that the average number of doctor visits per...

Statistics - Are these statements true or false? 1. The sample mean, the sample ...

statistics - Your samle is normally distributed with a mean age of 57. The ...

statistics - the dean of admissions in a large university has determined that ...

statistics - A specific study found that the average number of doctor visits per...

statistics - I cant figure this out!!! The income of trainees at a local mill ...

statistics - IQ scores are normally distributed with a mean of 105 and a ...

Statistics - IQ score are normally distributed with a mean of 95 and a standard ...

statistics - Suppose a random sample of 25 students is selected from a community...

statistics - The diameter of small Nerf balls manufactured at a factory in China...