Question

All else being equal, if we want to be more confident, we

Select one:

a. tighten the confidence interval.

b. decrease the margin of error

c. increase the margin of error.

Which of the following is NOT a step in hypothesis testing?

Select one:

a. Use the level of significance and the critical value approach to determine the critical value of the test statistic

b. Formulate the null and alternative hypotheses

c. Find the confidence interval.

d. Use the rejection rule to solve for the value of the sample mean corresponding to the critical value of the test statistic.

If a null hypothesis is rejected at a significance level of .05, it ______ be rejected at a significance level of .01.

Select one:

a.  may

b. will always

Answer 1

Ans

1 tighten the confidence interval so that sample statistic falls within range and probality of accepting a wrong hypotheses s falls

2 condlfidence interval is not always used and it's mainly used to determine certainty

3 may. It can't be always