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December 20, 2014

Homework Help: Statistics

Posted by Shawn on Friday, October 3, 2008 at 3:08pm.

A sample of 64 observations is selected from a normal population. the sample mean is 215 and the standard deviation is 15. conduct the following test of hypothosis using the .3 significance level.

Ho:u > or = 220
H1: u < 220

a) Is this a 1 tailed or 2 tailed test?
b) State the decision rule.
c) Compute the value of the test statistic.
d) What is your decision regarding the H0
e) What is the P value? Interpert

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