A researcher calculates a mean from a sample of 18 people. In analyzing her data, she states the following hypotheses: H0: ? = 20 and H1: ? ? 20. For ? = .05, which is an appropriate critical value?
a. 1.734
b. 2.110
c. 2.101
d. 2.086
b. 2.110
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Creating ratio tables or charts helps students in all of the following ways EXCEPT:
a. Application of build up strategy. b. Organize information. c. Show nonproportional relationships. d. Used to determine unit rate.
Rural and small town schools have difficulty in recruiting and retaining teachers. Professional isolation and chronically low salaries and benefits exacerbate the difficulty in attracting quality teachers to rural schools
a. True b. False
The correlation between the scores on a test of job aptitude and a measure of job proficiency is + .50 among 500 employed workers. The 50 workers who scored lowest in job proficiency and the 50 who scored highest are separated from the remainder, combined into one group, and recomputed. We should expect it to be
a. about the same as the first coefficient. b. higher than the first coefficient. c. lower than the first coefficient. d. invariable a negative value. e. different from the first coefficient, but we cannot predict if it would be higher or lower.
Some taxpayers can qualify for more than one filing status
Indicate whether the statement is true or false