1.Which is the narrowest confidence interval from a set of data?

a.95% confidence interval of the mean

b.90% confidence interval of the mean

c.99% confidence interval of the mean

d.97.5% confidence interval of the mean

2.If the p-value is less than 0.05 in the test of the population parameter , then

a.A 95% confidence interval for will definitely include 0.5.

b.A 95% confidence interval might contain 0.5.

c.A 95% confidence interval will contain 0.3 exactly 62.43% of the time.

d.A 95% confidence interval contains 1.645.

3.If the p-value is less than 0.05 in a test of the population mean , then

a.A 90% confidence interval will be wider than a 95% confidence interval.

b.A 95% confidence interval has probability of 95% of containing the mean parameter .

c.A 95% confidence interval definitely contains the population mean parameter .

d.A 95% confidence interval would contain 1 about 95% of the time.

4.Imagine that a statistic follows the Doha distribution and we perform a test that some parameter is equal to some value .Our critical values for a two-sided test at alpha level of significance are equal to LCL and RCL. We want to know whether there is evidence to conclude that the parameter is different from .

a.We have that evidence if our statistic is less than LCL or greater than RCL.

b.We have that evidence if the p-value is greater than alpha.

c.We have that evidence if our statistic is greater than 1.96.

d.We have that evidence if our statistic is equal to .

5.A sample of size n=9 is drawn in which the sample mean is 5 and the population standard deviation is assumed to equal 3.The 95% confidence interval is

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