Mathematics, 20.02.2020 19:37 rujirasri3620
4. Household size in the United States has a mean of 2.6 people and standard deviation of 1.4 people. However this distribution is skewed right as the smallest possible value is a household of 1 person butthe largest households can be very large indeed.(a) Suppose one household in the US is to be randomly selected. Can you calculate the probabilitythat the household size is higher than 4? If yes, calculate it; if no, explain why not.(b) Suppose 120 households are randomly selected and the average values in the sample is calculated. What is the expected value of mean size in the sample of 120 households?(c) Suppose 120 households are randomly selected and the average values in the sample is calculated. What is the standard deviation of mean size in the sample of 120 households?(d) What is the probability that the mean size of a random sample of 120 households is more than 3?
Answers: 2
Mathematics, 20.06.2019 18:02
Adalyn drove 12 miles from her home to her school and then drove back. graph a shows her distance from home during the trip. graph b will show her distance from the school during the trip. complete each statement about graph b.
Answers: 2
Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) ā sinh2(x) = 1 and (b) 1 ā tanh 2(x) = sech 2(x). solution (a) cosh2(x) ā sinh2(x) = ex + eāx 2 2 ā 2 = e2x + 2 + eā2x 4 ā = 4 = . (b) we start with the identity proved in part (a): cosh2(x) ā sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 ā sinh2(x) cosh2(x) = 1 or 1 ā tanh 2(x) = .
Answers: 3
Mathematics, 21.06.2019 20:00
Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?
Answers: 1
Mathematics, 21.06.2019 20:00
Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?
Answers: 3
4. Household size in the United States has a mean of 2.6 people and standard deviation of 1.4 people...
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