Tuesday

July 29, 2014

July 29, 2014

Posted by **Kristi** on Monday, October 31, 2011 at 1:54pm.

14. A sample of 40 CD’s from your collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes

a. Construct the 95 percent confidence interval for the mean.

b. Construct the 95 percent confidence interval for the mean using the t-value rather than the z-value. Comment on why the interval is larger when you use the t-value.

c. Why might normality of the data set be in question here? Comment on your answer.

**Related Questions**

Statistics - From her firm’s computer telephone log, an executive found that ...

statistics - A random sample of size 81 is taken from a large population, ...

statistics - 1. A random sample of size 49 is taken from a large population, ...

business statistics - For one of the tasks in a manufacturing process, the mean ...

Statistics - The null and alternate hypotheses are: H0: μ1 = μ2 H1: &#...

statistics - A sample of 400 high school students showed that they spend an ...

RES/342 - From her firm’s computer telephone log, an executive found that the ...

statistics - The manager at the YMCA believes members are staying longer at the ...

Statistics - How long does it take to have food delivered? A Chinese restaurant ...

Statistics - For a population with a mean of (mew) = 50 and a standard deviation...