Question

What conditions must be met to test a hypothesis about a population proportion?

What test statistic would we use when comparing two population proportions?

What test statistic would we use when comparing observed vs. expected frequencies?

If my degrees of freedom were 7 and I am comparing observed and expected frequencies at a 0.01 level of significance. What would my critical value be?

Answer 1

1)the conditions must be met to test a hypothesis about a population proportion are:-

a).the sample must be a simple random sample.

b)np 5 and n(1-p) 5.

2).the test statistic we will use when comparing two population proportion: Z statistic.

[ ]

3).The test statistic we will use when comparing observed vs. expected frequencies: chi square statistic.

4).my critical value be = 18.475

[ chi square critical value for alpha=0.01, df=7,right tailed test is:-

[ in excel type =CHISQ.INV.RT(0.01,7) ] ]

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