A 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 2
A 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.
Model of a longitudinal study in which 983 students were surveyed in 1984 and then again in 1985, 19
Projected Ethnic Changes in U.S. Population to 2050
First-pass effect.
Change in air temperature at various air flow rates for a 4 pass operation
The developing and emerging nations have high rates of population growth
Students pointing at a computer screen