Mathematics, 27.04.2021 15:10, brarob340
A Statistics professor has observed that for several years students score an average of 114 points out of 150 on the semester exam. A salesman suggests that he try a statistics software package that gets students more involved with computers, predicting that it will increase students' scores. The software is expensive, and the salesman offers to let the professor use it for a semester to see if the scores on the final exam increase significantly. The professor will have to pay for the software only if he chooses to continue using it. In the trial course that used this software, 246 students scored an average of 117 points on the final with a standard deviation of 8.5 points. Complete parts a) and b) below. a) Should the professor spend the money for this software? Support this recommendation with an appropriate test. Use 0.05. What are the null and alternative hypotheses? : What is the P-Value?
Answers: 1
Mathematics, 20.06.2019 18:04, allenlitterell
If the public debt of a country in 2009 was $10432000000000 and the budget for 2010 was in deficit by $201645000000, what was the public debt in 2010? do not include commas in your answer.
Answers: 3
Mathematics, 21.06.2019 15:00, lm18618
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.
Answers: 2
Mathematics, 21.06.2019 19:00, ltawiah8393
Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?
Answers: 1
Mathematics, 21.06.2019 20:00, aaliyahvelasauez
Last one and the bottom answer choice is y=(x-4)^2+1 you guys!
Answers: 1
A Statistics professor has observed that for several years students score an average of 114 points o...
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