Question

Describe a situation in which:

a. A one-tailed test of hypothesis would be appropriate

b. A two-tailed test of hypothesis would be appropriate

c. A hypothesis test for a t-distribution would be appropriate

d. A hypothesis test for a z-distribution (z score) would be appropriate

Answer 1

a] Research evidence shows that the school dropouts 25% greater. 120 out of 480 students dropped out the last year. The research evidence is enough?

b] Research evidence shows that the school dropouts equal to 25%. 120 out of 480 students dropped out the last year. The research evidence is enough?

c] Sample from European people is high extroversion compared to the sample of Latin Americans. Research study say that there is no difference between Latin Americans and Europeans on the scale of extroversion.

d] According to the teacher her class students IQ is above the average IQ. The average IQ scores of her students reflect the score of 115. Does this data is enough to support the teachers claim?