please answer this correctly

Long Quis i1 2 Directions: Choose the best answer to the given questions or statements. Write the letter of your choice on a separate sheet of paper. 1. What test statistic will be used if the sample size is below 307 A. t-test C. population moun B. z-test D. standard deviation 2. In using t-test for a population mean, we assume that the sample is selected randomly. The given statement is: A. always true C. sometimes true B. always false D. sometimes false 3. If the population standard deviation is unknown, what test statistic is to be used? A. I-test C. population mean B. z-test D. standard deviation 4. In finding the t-computed value, which formula should be used? C. ImTH D. tax-/ 5. When should you use the z-test? When you are testing for a population mean I When the population standard deviation is given I. When the sample standard deviation ONLY is given IV. When you are testing with small sample sizes, n