When do we use the t-test (and t-distribution)?
A. When the population standard deviation is known
B. When the population standard deviation is not known
C. When the sample standard deviation is known
D. When the sample standard deviation is not known
Ans: B. When the population standard deviation is not known
Psychology
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Jose's medically ideal weight is 250 pounds. He would be considered to be obese when and if he weighed ________ pounds
a) 275 b) 300 c) 320 d) 330
Psychology
If your IQ test score is 120 and you take the same test two months later and arrive at the same score, the test is said to be _____
Fill in the blank with correct word
Psychology