Exam 7: Hypothesis Testing I the One-Sample Case

Which of the following must be normally distributed in order to proceed with hypothesis testing of means and proportions?

In tests of significance, if the test statistic falls in the critical region, we may conclude that

In tests of significance, if the test statistic does NOT fall in the critical region, we

When testing a single sample mean for significance when the population standard deviation is unknown and sample size is 75, the correct sampling distribution is

The research hypothesis (H1) typically states what the researcher expects to find and

To conduct a test of hypothesis with a single sample mean, we must assume

From a random sample of size 200 drawn from a local community, 120 respondents identify themselves as Democrats. For the community as a whole, 75% of the residents classify themselves as Democrats. In this research situation

In a t test of differences between means, increasing sample size will affect

The critical region is

Which of the following is NOT an assumption required for a test of hypothesis with a single sample mean?

Sixty percent of the respondents in a random sample drawn from a neighborhood are Democrats. The community as a whole is 75% Democrat. The difference between sample and population has been tested and the null hypothesis has been rejected. What may we conclude?

As the Critical Region decreases in size

If we reject a null hypothesis of "no difference" at the 0.05 level

A researcher is interested in the effect that neighborhood crime-watch efforts have on the crime rate in the inner city, but he is unwilling to predict the direction of the difference. The appropriate test of hypothesis would be

All tests of hypothesis are based on the assumption that

If the test statistic does not fall in the critical region, we

All other things being equal, with which of the following alpha levels would we be most likely to reject the null hypothesis?

The research and null hypotheses _________ each other

With alpha set at .05, the Critical Region for a two-tailed test would begin at $\pm$ 1.96. In a one-tailed test at the same alpha level the Critical Region would begin at

In order to conduct a test of hypothesis with means or proportions, the sampling distribution must be