Homework Help: Statistics

Posted by Alex on Saturday, January 15, 2011 at 4:55pm.

The heights of the students in a statistics class are approximately normal with mean 68 inches and a standard deviation of 2.75 inches. Suppose that the heights of the 15 male students in the statistics class are also approximately normal with mean 71 inches.
Would the standard deviation for the males in the class be greater than 2.75 inches, exactly 2.75 inches, or less than 2.75 inches?

Statistics - bobpursley, Saturday, January 15, 2011 at 9:30pm
I think there is a problem here. What if there are 215 students in the stat class, 15 of which are males. The remaining 200 are female. For the statistics class, the females overwhelm the males, so the Class statistics largely reflect the females, and the males is just down in the noise. Now standard deviation: I dont see how any analysis can be done without making some assumptions about class size.

Answer this Question

Related Questions

Statistics - The distribution of heights of women aged 20 to 29 is approximately...
statistics - Help me! Population of heights of college students is approximately...
statistics - Assume that the population of heights of male college students is ...
Prob and Stats - To estimate the mean height population of male students on your...
statistics - Suppose that the height of male students at a large university is ...
statistics - The heights of 500 boys are measured and found to be normally ...
statistics - The heights of 10000 individuals are approximately normally ...
statistics - The heights of 10000 individuals are approximately normally ...
Statistics - The distribution of heights of American women aged 18 to 24 is ...
statistics - The heights of young women are approximately normal with a mean 64....

For Further Reading

First Name:
School Subject:
Answer: