In general, the z test is more powerful than the t test because _________
a. with the z test, the sample mean is closer to the population mean than with the t test
b. with the t test we lose a degree of freedom
c. the standard deviation of the sample raw scores is larger with the t test
d. with the z test, we know ?, whereas with the t test, we must estimate it.
D
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Four students: Alice, Betty, Cindy, and Deb were talking. Alice said "I want to see something for myself before I believe it.". Betty said I know something is causing me to be so upset, even though I don't know for sure exactly what it is.". Cindy said "I love science class because it's just like solving puzzles.". And Deb said " I like to read things in which every word counts. I like my reading
material to be accurate, but as short as possible.". Which of the four students' statements reflects the scientific value of curiosity? a. Alice's c. Cindy's b. Betty's d. Deb's
Alexander and Higgins (1993) found that actual-ideal discrepancies in expectant parents predict:
a. increased joy after the birth of the child b. increased sadness after the birth of the child c. the level of parenting skills d. a and c e. none of the above
According to recent research, the median duration of recurrent (subsequent to the first episode) major depressive episodes is a. 1 to 2 months
b. 4 to 5 months. c. 7 to 9 months. d. 11 to 12 months.
Vasocongestion may cause ____
a. the clitoral glans to become erect b. the clitoral glans to retract behind the clitoral hood c. breasts to decrease in size d. heart and breathing rates to return to normal