Mathematics, 15.04.2021 18:40 vorequeen
In a random sample of 80 students in first grade, the mean hours of sleep per Night was 9.4 with a standard deviation of 0.41 in a random sample of 50 students in the 12th grade mean hours of sleep per night was 7.5 with a standard deviation of 0.52. Which intervals is a 99% confidence interval for the difference between the mean hours of sleep?
Answers: 2
Another question on Mathematics
Mathematics, 21.06.2019 19:30
Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2
Answers: 1
Mathematics, 21.06.2019 20:00
Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?
Answers: 2
Mathematics, 21.06.2019 20:00
Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?
Answers: 3
You know the right answer?
In a random sample of 80 students in first grade, the mean hours of sleep per Night was 9.4 with a s...
Questions
English, 15.11.2019 09:31
Mathematics, 15.11.2019 09:31
History, 15.11.2019 09:31
Physics, 15.11.2019 09:31
Mathematics, 15.11.2019 09:31
History, 15.11.2019 09:31
Mathematics, 15.11.2019 09:31
Social Studies, 15.11.2019 09:31
Mathematics, 15.11.2019 09:31
Social Studies, 15.11.2019 09:31
