Tuesday

October 21, 2014

October 21, 2014

Posted by **looking for someone to varify my work please** on Tuesday, April 6, 2010 at 4:24pm.

A standard placement test has a mean of 105 and a standard deviation of ó = 13. Determine the minimum sample size if we want to be 99% certain that we are within 3 points of the true mean.

Answer:

N = ( zc ó/E)^2

= (2.575 x 13/3)^2

= 121

**Answer this Question**

**Related Questions**

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

statistics - what are the mean and standard deviation of a sampling distribution...

statistics - Given a sample size of 38, with sample mean 660.3 and sample ...

Statistics - This is the first question..... For a population that has a ...

Statistics - An IQ test is designed so that the mean is 100 and the standard ...

Statistics - data from sample of 400 cases, variable has 95% confidence interval...

statistics - A standard IQ test has a mean of 98 and a standard deviation of 16...

statistics - An IQ is designed so that the mean is 100 and the standard ...

Statistics: Sample Size, Variance and Standard Dev - Sample Size, Variance and ...

statistics - You want to determine if your widgets from machine 1 are the same ...