Mathematics, 22.06.2019 20:30 ovowendygirl7595

# Arandom sample of size n1 = 10 is selected from a normal population with a mean of 120 and a standard deviation of 12. a second random sample of size n2 = 15 is selected from a normal population with a mean of 105 and a standard deviation of 20. let m1 and m2 be the two sample means. the two populations are thought to be independent. let x = m1 â€“ m2 find: (d) the expected value and the variance of x. (e) the probability that x exceeds 10. (f) the probability that x is between 12.5 and 17.5.

Answers: 1

Mathematics, 20.06.2019 18:02

Josue tosses a coin and spins the spinner at the right. what are all the possible outcomes

Answers: 1

Mathematics, 21.06.2019 15:30

The segments shown below could form a triangletrue or false

Answers: 3

Mathematics, 21.06.2019 17:30

Abby bought 6 books for math and science class for college for a total of $440. math books cost $73 and science books cost $74. how many of each type of book did she buy?

Answers: 1

Mathematics, 21.06.2019 20:00

Ineed to find the interval where it increases and decreases. me.

Answers: 1

Arandom sample of size n1 = 10 is selected from a normal population with a mean of 120 and a standar...

Social Studies, 24.08.2019 08:30

World Languages, 24.08.2019 08:30

History, 24.08.2019 08:30

Health, 24.08.2019 08:30

Mathematics, 24.08.2019 08:30

Biology, 24.08.2019 08:30

Spanish, 24.08.2019 08:30

World Languages, 24.08.2019 08:30

Mathematics, 24.08.2019 08:30