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Assessment 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 30? A. t-test C. population mean 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. t-test c. population mean B. Z-test D. standard deviation - 4. In finding the t-computed value, which formula should be used? A. t= -2 B. t = - C. t = -1 D. t = VE VE 5. When should you use the z-test? 1. When you are testing for a population mean When the population standard deviation is given III. When the sample standard deviation ONLY is given IV. When you are testing with small sample sizes, n < 30. A. I and II B. II and III C. II and IV D. I and III For nos. 6-8, refer to the problem below: Milky Milk is sold in packets with an advertised mean weight of 0.5kgs. The standard deviation is known to be 0.11 kilograms. A consumer group wishes to check the accuracy of the advertised mean and takes a sample of 36 packets finding an average weight of 0.47kgs. 6. What test statistic should be used? A t-test C. population mean B. z-test D. standard deviation
Sagot :
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