If the test takers find an item to which an answer is not known, it may be _______ to leave it blank and go on with the test.
举一反三
- In a test of the mean of a population, if the population variance is: A: known, a z- distributed test statistic is appropriate. B: known, a t- distributed test statistic is appropriate. C: unknown, a z -distributed test statistic is appropriate.
- jQuery类选择器可以通过指定的class查找元素语法是（） A: $（"test."） B: $（"test"） C: $（"#test"） D: $（".test"）
- Which of the following is true of Chow test? A: It is a type of t test. B: It is only valid under homoskedasticty. C: It is a type of sign test. D: It is only valid under heteroskedasticity
- An analyst does research about hypothesis testing. Which of the following test statistics is most appropriate test statistics for two means based on samples that we believe are dependent A: T-test. B: F-test. C: Chi-square test.
- which of the following can be used to eliminate the determinate error A: conducting a blank test B: performing a comparative test C: calibrating the instrument D: increasing number of measurement