Lyle conducted a study to determine if a new class program could increase the test performance of students with high functioning autism. His experiment specifically included those students who already had high test scores. He should be concerned about which potential form of internal invalidity in his experiment?
a. mortality.
b. testing.
c. maturation.
d. statistical regression.
e. history.
D
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__________ was the first American president to focus centrally on health care issues
Fill in the blanks with correct word
__________ indicated that bureaucracy as an ideal type is typified by a clear cut division of labor, or hierarchy of authority; an elaborate system of rules and regulations; people treated as "cases," not as "individuals"; and a career
those working within the bureaucracy. Fill in the blanks with correct word
Successful urban rehabilitation and community preservation relies on which two factors?
a. community cohesion and outside economic investment b. demolishing slums and government oversight c. leadership by experts and relocation services d. community involvement and affordable housing
Consider the following hypothetical scores: 21, 25, 37, 38, 39, 42, 44, 45. Which value is closest to the variance?
A. 9 B. 19 C. 24 D. 77