Friday

March 27, 2015

March 27, 2015

Posted by **heather** on Wednesday, October 21, 2009 at 5:10pm.

Before 70 80 92 99 93 97 76 63 68 71 74

After 69 79 90 96 91 95 75 64 62 64 76

- statistics -
**MathGuru**, Thursday, October 22, 2009 at 9:26pmFor a 99% confidence interval, you can use + or - 2.58 from a z-table. You will need to find the correct formula to use for the mean difference.

**Answer this Question**

**Related Questions**

statistics - A test of writing ability is given to a random sample of students ...

Statistics - These are the only ones that I am having problems with. Please help...

Statistics - You are given the following information obtained from a random ...

statistics - Randomly selected students participated in an experiment to test ...

statistics - A simple random sample of students is selected, and the students ...

Statistics - Thirty random students took a calc test. If the sample mean was 90...

statistics - a random sample of 80 college students was selected to participate ...

statistics - In a study designed to test the effectiveness of magnets for ...

Statistics - Help me understand this problem, I have several more like this & ...

statistics - A researcher hypothesizes that individuals who listen to classical...