A researcher visits a population of 1,200 local residents to determine the proportion of local residents who support a new smoking ban. In this case, the sample space is
A. equal to the number of residents who support the new smoking ban.
B. equal to the population of 1,200 local residents.
C. equal to the number of local residents who smoke.
D. unknown.
Ans: B
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Which of the following statements about validity and reliability is correct?
a. If a test has low validity, its reliability must be low as well. b. If a test has high reliability, its validity must be low. c. Validity is more important than reliability. d. If a test is not valid, it might still be reliable.
When students rename and simplify fractions, they must understand the concept that
a. different numeric forms may represent a fraction number. b. they are multiplying by one, the identity factor, to arrive at their answers. c. fractions always represent a number less than one. d. both A and B are correct.
Accuracy of prediction is enhanced by:
a. having the means of the criterion and predictor variables be close in value. b. decreasing the variability in the predictor variable distribution. c. decreasing the variability in the criterion variable distribution. d. reducing the standard error of estimate.
In order to provide the very best development program possible for school employees, it is best to use a pre-manufactured and packaged development plan that covers all possible areas of concern
Indicate whether this statement is true or false.