Two health classes took the same test. Mr. Sanchez’s class had a mean score of 70 and a standard deviation of 6. Ms. Lindsey’s class had a mean of 78 and a standard deviation of 12. Which class is probably grouped according to ability into a homogeneous class?
a. Mr. Sanchez’s
b. Ms. Lindsey’s
c. Both classes
d. Cannot determine with the information given
a. Mr. Sanchez’s
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Which is NOT one of the typical consequences of bilingualism?
A. The child has a smaller vocabulary than a monolingual child. B. The child has better problem-solving abilities compared to a monolingual child. C. The child has better metalinguistic skills compared to a monolingual child. D. The child is more cognitively flexible compared to a monolingual child.
Placebo and sham groups in medical research highlight the value of which of the following in educational research?
A) random samples B) standardized achievement C) reliable measures D) meaningful control groups
For a variable with 
= 175.00, how large should the sample be for a desired 95% confidence interval width of 50?
a. 14 b. 47 c. 188 d. 2209
Which of the following statements of how to use extrinsic rewards is supported by our text?
a) Use them on most tasks, regardless of their intrinsic interest. b) Use primary, not secondary, extrinsic reinforcers. c) Do not use them in classroom situations. d) Use them mainly for subjects that have low intrinsic interest.