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.
Exponential growth in the Canadian migratory population of the whooping crane after 70 years of cons
During their annual migration, the entire population of Arctic terns move from the Arctic Ocean in t
The Inverted Income Pyramid: The Proportion of Income Received by Each Fifth of the U.S. Population
Population and Settlement
Population Distribution
An example of continuous variation: biology students organized according to height.