Identify the situations that involve inference about a difference between two population means. a. The National Assessment of Educational Progress (NAEP) is the largest national assessment of what students in the U. S. know and can do in various subject areas. Is the mean score for 8th graders in Texas on the NAEP math test higher than the national average of 281?
b. The mean score on the NAEP math test for 8th graders in Texas is compared to the mean score for 8th graders in California.
c. A school district uses questions from the NAEP math test to assess the effectiveness of a new computer-based math instruction. Students take the test before and after the intervention and the district looks for improvement.
d. A school district compares a computerized math program to individualized tutoring for 4th graders who have difficulty in math. They use questions from the NAEP math test in a pre-test and post-test design to assess improvement in math skills for the two groups.

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

In a sample of 2023 u.s. adults, 373 said franklin roosevelt was the best president since world war ii. two u.s. adults are selected at random from the population of all u.s. adults without replacement. assuming the sample is representative of all u.s. adults, complete parts (a) through (d). (a) find the probability that both adults say franklin roosevelt was the best president since world war ii. the probability that both adults say franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (b) find the probability that neither adult says franklin roosevelt was the best president since world war ii. the probability that neither adult says franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (c) find the probability that at least one of the two adults says franklin roosevelt was the best president since world war ii. the probability that at least one of the two adults says franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (d) which of the events can be considered unusual? explain. select all that apply. the event in part left parenthesis a right parenthesis is unusual because its probability is less than or equal to 0.05. the event in part (b) is unusual because its probability is less than or equal to 0.05. none of these events are unusual. the event in part (c) is unusual because its probability is less than or equal to 0.05.