Mathematics, 14.04.2020 19:35 daniellekennedy05

Which of the following statements are true: (i) Increasing sample size while keeping the same confidence level increases the width of the confidence interval and improves the accuracy of your estimate. (ii) The T distribution curve is centered at 0 and symmetric. Furthermore, the T distribution curve has a thicker tail than the standard Normal curve and comes close to the standard Normal curve as the sample size decreases. (iii) The conclusion of a right tail hypothesis test (test of significance) for a population mean at the significance level should always match the conclusion of a two-sided confidence interval for estimating the same population mean at the confidence level 1- (iv) Keeping all other quantities fixed, increasing the significance level will increase the power of the test.

Answers: 1

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 15:20, lizziesuks

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Answers: 2

continue

Mathematics, 21.06.2019 17:00, michaelbromley9759

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a. about 4 b. about 8 c. about 40 d. about 21

Answers: 1

continue

Mathematics, 21.06.2019 17:30, nayellisoto15

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Answers: 1

continue

Mathematics, 21.06.2019 19:40, marshallmattah

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Answers: 1

continue

You know the right answer?

Which of the following statements are true: (i) Increasing sample size while keeping the same confid...