Homework Help: Statistics

Posted by Tony on Saturday, November 19, 2011 at 8:23am.

A researcher is interested in whether students who attend private high schools have higher average SAT scores than students in the general population. A random sample of 90 students at a private high school is tested and has a mean SAT score of 1050. The average score for public high school students is 1000(ó= 200). Is this a one or two tailed test?

Statistics - PsyDAG, Sunday, November 20, 2011 at 4:19am
Since you are only concerned with finding if the sample mean is greater than the population mean, it is a one-tailed test.

Ho: mean = 1000
Ha: mean > 1000

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