Which of the following z-scores indicates the most extreme observation?
a. –4.3.
b. 0.0.
c. 1.9.
d. 3.4.
a score of 84 separates the lowest 75% of the scores from the highest 25% of the scores, and a score of 65 separates the lowest 25% of the scores from the highest 75% of the scores. what is the percentile rank of a score of 84?
a. 25.
b. 65.
c. 75.
d. 84.

What values of data might affect the statistical measures of spread and center

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

He concluded that a heavier object dropped from the same height as a lighter object will land