<PRE><B>Question 773417</B>
A random sample of 400 college students was selected and 120 of them had at least one motor vehicle accident in the previous two years. A random sample of 600 young adults not enrolled in college was selected and 150 of them had at least one motor vehicle accident in the previous two years. 
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At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a 
1 or 2 tail test?
Is this a one sample or two sample test?::: 2 tail
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Is this a test of sample means or sample proportions?::: sample proportions
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What are your critical values?::: z = +/- 1.96
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What is the value of your pooled proportion?::: 0.27
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What is the value of your test statistic?::: z = 1.7447
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What is your decision?:::Fail to reject Ho.
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If you determine not to reject the null hypothesis what is your conclusion?
At the 5% significance level, the proportions are not different.
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Cheers,
Stan H.
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