The major problem with nonresponse in questionnaire studies is:
a. it reduces the quantity of data.
b. it may introduce bias in the data.
c. its source cannot be identified.
d. the analysis of data must be changed.
b
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If you multiply a matrix representing a polygon by a 2 x 2 matrix having rows of 0, 1 and -1, 0, what is the result?
a) A translation of 1 unit to the right. b) A reflection over the x-axis. c) A reflection over the y-axis. d) A clockwise rotation of 90°. e) A counter clockwise rotation of 90°.
Independent reading is important because it
a. accounts for much of children's annual vocabulary growth. b. provides practice in decoding strategies. c. develops automaticity. d. all of the above
When a hypothesis is confirmed in an empirical investigation, one concludes that
a. the hypothesized relationship has been proven to be true. b. the theory from which the hypothesis was derived has been proven to be true. c. it is probable that the hypothesized relationship is true. d. it is just as probable that the hypothesized relationship is false as it is true.
Refer to Exhibit 6-5. We want to see how scores on this examination are related to scores on another examination
a. mean c. z-score b. standard deviation d. Pearson’s r