# A random sample of 10 boys...

• Dec 30th 2009, 02:45 AM
zorro
A random sample of 10 boys...
Question : A random sample of 10 boys had a following IQ's 70, 120,110,101, 88,83, 95,98,107, 100. Whether data supports the assumption of a population mean =100?
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I actual didn't understand what to do in this
• Dec 31st 2009, 04:50 PM
matheagle
This seems to be a two sided test
$H_0:\mu=100$ vs. $H_a:\mu\ne 100$

The test statistic is a t with 9 degrees of freedom

$t^*_9={\bar X-100\over s/\sqrt{10}}$
• Dec 31st 2009, 08:17 PM
zorro