Mathematics, 05.11.2020 19:10 thekid3176
The mean income for people in a certain city (in thousands of dollars) is 37 with standard deviation 80 (thousands of dollars). A pollster draws a sample of 45 people to interview.
A. What is the probability that the mean income of the sample people is more than 24 (thousands of dollars)?
B. What is the probability that the sample mean income is between 41 and 45?
C) Find the 80th percentile of the sample mean.
D) Would it be unusual for the sample mean to be less than 38?
E) Do you think it would be unusual for an individual to have an income of less than 38? Explain.
Answers: 3
Mathematics, 21.06.2019 15:50
Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.
Answers: 2
Mathematics, 21.06.2019 19:30
Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?
Answers: 1
The mean income for people in a certain city (in thousands of dollars) is 37 with standard deviation...
Mathematics, 27.06.2019 00:00
History, 27.06.2019 00:00
Mathematics, 27.06.2019 00:00
Physics, 27.06.2019 00:00
Computers and Technology, 27.06.2019 00:00
Computers and Technology, 27.06.2019 00:00
Business, 27.06.2019 00:00
History, 27.06.2019 00:00
English, 27.06.2019 00:00
History, 27.06.2019 00:00
Mathematics, 27.06.2019 00:00