The t-test for independent groups is the appropriate inferential test when
A. a margin of error is needed for single random sample from a population.
B. comparing two means.
C. comparing more than two means.
D. calculating a correlation between groups.
B. comparing two means.
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There are two gumball machines outside the local grocery store, one large machine and one small machine. Both machines have only yellow and orange gumballs, and each machine contains 50 percent of each color. For each coin, the large gumball machine dispenses 15 gumballs, while the small machine dispenses 5 . Tim is a young genius whose interests include probability and sound decision-making. His
"probability project of the day" is to get a greater percentage of either of the colors, but not an equal amount of each color. Given this, and presuming Tim has only one coin, a. he should use his coin in the large machine. b. he should use his coin in the small machine. c. it doesn't make a difference which machine he uses. d. he should wait for other people to use the machines and see what they get.
What clue tells a student that they have conducted a thorough literature search?
a. When they have found enough information to add to their paper b. When they are at the end of the paper c. When they run out of time d. When they read many articles that cite material that they have already read
Which of the following is NOT part of the goal orientation theory?
a) mastery/approach b) achievement/ avoidance c) performance/avoidance d) mastery/avoidance
One psychosocial outcome of adolescence is __________, or an emerging understanding of
where one has come from and where one is going regarding interpersonal relationships and careers. Fill in the blanks with correct word