Mathematics, 23.05.2020 00:06, cocoapop

In a random sample of 40 people who rode a roller coaster one day, the mean wait time is 52.4 minutes with a standard deviation of 9.5 minutes. In a random sample of 50 people who rode a Ferris wheel the same day, the mean wait time is 14.1 minutes with a standard deviation of 2.3 minutes.

Which interval is the 99% confidence interval for the difference between the mean wait times of everyone who rode both rides?

A: (34.3, 42.3)
B: (36.9, 40.7)
C: (36.8, 39.8)
D: (35.8, 40.8)

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 12:40, thomaswillmsn7496

The graph below shows the amount of money left in the school’s desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the school’s desk fund decrease?

Answers: 1

continue

Mathematics, 21.06.2019 17:00, figueroajorge8291

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

Answers: 1

continue

Mathematics, 21.06.2019 18:00, heids17043

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

Answers: 1

continue

Mathematics, 21.06.2019 18:10, hellodarkness14

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Answers: 1

continue

Do you know the correct answer?

In a random sample of 40 people who rode a roller coaster one day, the mean wait time is 52.4 minute...