Tuesday

January 27, 2015

January 27, 2015

Posted by **carrie** on Tuesday, January 4, 2011 at 6:09am.

A sample of 19 students was selected in order to determine whether the average age of students had increased.

The average age of the students in the sample was 23 with a standard deviation of 3.5. Determine whether or not there has been an increase in the average age of the evening students. Use a 0.1 level of significance.

- statistics -
**PsyDAG**, Tuesday, January 4, 2011 at 8:58amDo you want P = 0.1 or .01?

Z = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√(n-1)

If only one SD is provided, you can use just that to determine SEdiff.

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

**Answer this Question**

**Related Questions**

statistics - The average age of statistics students nationwide is 22. The ...

PROBLEM SOLVING IN MATHEMATICS - the average age of a group of teachers and ...

statistics - To determine how many hours per week freshmen college students ...

Probability - Find the conditional probability. Suppose one card is selected at ...

Statistics - A class consists of 9 students with an average age of 40. When the ...

statistics - Suppose that two employees have to be fired from a group of seven...

Statistics - The age distribution of students at a community college is given ...

statistics - The average age for licensed drivers in a county is µ= 42.6, σ...

statistics - If the ages of colleges students are normally distributed with a ...

Statistics - A newspaper article stated that college students at a local ...