Thursday

November 27, 2014

November 27, 2014

Posted by **Kathryn** on Tuesday, October 4, 2011 at 6:12pm.

•

What % of the examinees would be expected to get a score of 65 or >?

- statistics -
**drwls**, Tuesday, October 4, 2011 at 8:44pmThe mean is p*N = 50

where p is the probability of getting gthe correct answqer by guessing at random. N is the number of tosses

The variance is p(1 -p)N = 25

The standard deviation is

ó = sqrt25 = 5.

Use a normal ditributuion curve for the probability of getting a score of 65 or better. You are talking 3 sigma from the mean.

**Answer this Question**

**Related Questions**

Statistics - I think the answer to this question is False but I would like to ...

Statistics - You have a population that has a mean of 100 and a standard ...

Behavioral Statistics - You have a population that has a mean of 100 and a ...

statistics - Terms and Definitions matching ___ Statistics ___ Discrete variable...

math - the question is: If you know that 4 of the 10 items on a true-false test ...

Chemistry - 1. A combination reaction may also be a displacement reaction. True ...

statistics - Find the first arithmetic mean between 100 and 135 given the ...

HEALTH HELP PLEASE!! - Fats help maintain your cell membranes. (1 point) True ...

statistics - 4. A large company insists that all job applicants who are invited ...

statistics - Assume that a test is given to a large number of people but we do ...