Question

1. if You are testing a hypothesis about a population proportion and a sample size is over 100 what is the proper test statistic to use?

A) z statstic

B) chi-square

c) t statistic

d) not enough data

2. If you are using the critical value approach to do a single tailed hypothesis test on the population mean, what impact will a smaller standard error have on the critical value of your test statistic?

A) critical value will increae

b) critical Value will decrease

c) not enough data

d) no change in critical value

Answer 1

1. We know that if sample size is greater than 30,then we use z statistic.

Here for testing a hypothesis about a population proportion and a sample size is over 100 .

The proper test statistic to use is Z statistic (A)

2. We know that a smaller standard error will no effect on critical value.

So if we are using the critical value approach to do a single tailed hypothesis test on the population mean, there is d) no change in critical value with a smaller standard error  of our test statistic.

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