1. If a uniform distribution and normal distribution both have the same mean and the same range, the normal distribution will have a larger standard deviation than the uniform distribution. True or False?
2. If r = .55 and n = 16, then the correlation is significant at alpha = .05 in a two-tailed test. True or False
3. In a left-tailed test, a statistician got a z test statistic of -1.720. What is the p-value?
.4292
.0792
.0427
.0301
4. If SSR is 1800 and SSE is 200, then R squared is .90. True or False?
5. In developing a confidence interval estimate for the population mean, which of the following is true?
The larger the sample standard deviation, the wider will be the interval estimate, all other things being equal.
If the population standard deviation is unknown, the appropriate critical value should be obtained from the t-distribution.
The confidence interval developed from a smaller sample size will have a larger margin of error than one obtained using a
larger sample size, all other things being equal.
All of the above are true.