Mathematics, 14.04.2020 16:00 leannamat2106
The probability distribution of the number of students absent on Mondays, is as follows: X 0 1 2 3 4 5 6 7 f(x) 0.02 0.03 0.26 0.34 0.22 0.08 0.04 0.01 (a) What is the probability that more than 3 students are absent. (b) Compute the expected value of the random variable X . Interpret this expected value. (c) Compute the variance and standard deviation of the random variable X . (d) Compute the expected value and variance of Y=7X+3 . (e) Compute the covariance Cov(X, Y) (f) What is the value of the ratio Cov(X, Y)/Var(X) ? (g) What is the value of Cov(X, Y)/Var(X) for Y=β0+β1X ?
Answers: 3
Mathematics, 21.06.2019 18:30
Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.
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Drag the tiles to the correct boxes to complete the pairs. using the properties of integer exponents, match each expression with the correct equivalent expression.
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Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?
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Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.
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The probability distribution of the number of students absent on Mondays, is as follows: X 0 1 2 3 4...
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