The state lottery claims that the probability of winning is p = 1/10 for one of its scratch-off games. If this is true, then what is the probability of getting at least 10 winning tickets in a sample of n = 100? Hint: Use interval-based calculations because no critical region is involved.
A) p(z > 0.17)
B) p(z > 0)
C) p(z > 0.27)
D) p(z > 0.33)
Question 2A research report describing the results from a repeated-measures study states: The data show no significant difference between the two treatments, t(10 ) = 1.65, p > .05. Based on this report, you can conclude that a total of ____ individuals participated in the research study.
A) 9
B) 10
C) 11
D) 12
Question 3A report noted that for the population of 9th graders, one-third of the students are unable to pass a quiz in basic geography. One teacher, having spent a great deal of time on geography instruction, gave the same quiz to a group of n = 72. Only X = 18 students in the group did not pass the test. The teacher would like to know if the number of students in this class who failed the quiz is significantly different from the general population. For this test, what is the z-score corresponding to X = 18?
A) z = 0.375
B) z = -1.00
C) z = -1.50
D) z = 2.00
Question 4A researcher obtains t = 2.35 for a repeated-measures study using a sample of n = 8 participants. Based on this t value, what is the correct decision for a two-tailed test?
A) Reject the null hypothesis with = .05 but not with = .01.
B) Reject the null hypothesis with either = .05 or = .01.
C) Fail to reject the null hypothesis with either = .05 or = .01.
D) Change to = .10.
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