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The pmf of the amount of memory X (GB) in a purchased flash drive is given...
The pmf of the amount of memory X (GB) In a purchased flash drive is given...
The pmf of the amount of memory X (GB) In a purchased flash drive is given as the following. 2 4 8 16 p(x)0.05 0.10 0.30 0.40 0.15 (a) Compute E(X). (Enter your answer to two decimal places.) 7.05 (b) Compute V(X) directly from the definition. (Enter your answer to four decimal places.) 69.2500 c) Compute the standard deviation of X. (Round your answer to three decimal places.) 4.811 X GB (d) Compute V(x) using the shortcut formula. (Enter your...
12.-14 points DevoreStat9 3.E.029 The pmf of the amount of memory X (GB) in a purchased...
12.-14 points DevoreStat9 3.E.029 The pmf of the amount of memory X (GB) in a purchased flash drive is given as the following. 1 2 4 83 16 p(x) 0.05 0.15 0.30 0.450.05 (a) Compute E(X). (Enter your answer to two decimal places.) GB (b) Compute V(X) directly from the definition. (Enter your answer to four decimal places.) (c) Compute the standard deviation of X. (Round your answer to three decimal places.) GB (d) Compute V(x) using the shortcut formula....
1. The probability distribution of the amount of memory X (GB) in a pur- chased flash...
1. The probability distribution of the amount of memory X (GB) in a pur- chased flash drive is given below. X 1 .05 2 4 8 16 .10.35 | .40.10 p(x) Compute the following: E(X), E(X2), V(X), E(3X + 2), E(3X² + 2), V(3x + 2), E(X+1), V(X + 1). 2. The n candidates for a job have been ranked 1, 2, ..., n. Let X =the rank of a randomly selected candidate, so that X has pm f n...
An instructor has given a short quiz consisting of two parts. For a randomly selected student,...
An instructor has given a short quiz consisting of two parts. For a randomly selected student, let X-the number of points earned on the first part and Y joint pmf of X and Y is given in the accompanying table. the number of points earned on the second part. Suppose that the 0.02 0.04 100.01 0.15 10 0.02 0.20 0.15 15 0.10 0.10 0.01 0.06 0.14 (a) Compute the covariance for X and Y. (Round your answer to two decimal...
A tidal wave or tsunami is usually the result of an earthquake in the Pacific Rim,...
A tidal wave or tsunami is usually the result of an earthquake in the Pacific Rim, often 1000 or more miles from Hawaii. Tsunamis are rare but dangerous. Many tsunamis are small and do little damage. However, a tsunami nine meters or higher is very dangerous Civil Defense authorities sound an alarm telling people near the beach to go to higher ground. About 30% of all recorded tsunamis have been nne meters or higher t You are writing a report...
An instructor has given a short quiz consisting of two parts. For a randomly selected student,...
An instructor has given a short quiz consisting of two parts. For a randomly selected student, let X = the number of points earned on the first part and Y - the number of points earned on the second part. Suppose that the joint pmf of X and Y is given in the accompanying table. plx, y) 0 5 10 15 0 0.02 0.06 0.02 0.10 X 5 0.04 0.15 0.20 0.10 10 0.01 0.15 0.14 0.01 (a) Compute the...
Rate of Return if State Occurs State of Probability of Economy State of Economy Stock A...
Rate of Return if State Occurs State of Probability of Economy State of Economy Stock A Stock B Stock C Boom 0.10 0.18 0.48 0.33 Good 0.30 0.11 0.18 0.15 Poor 0.40 0.05 -0.09 -0.05 Bust 0.20 -0.03 -0.32 -0.09 a. Your portfolio is invested 25 percent each in A and C and 50 percent in B. What is the expected return of the portfolio? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal...
he probability distribution of a random variable x is given. -196 -195 191 -189 -185 p(X...
he probability distribution of a random variable x is given. -196 -195 191 -189 -185 p(X = x) 0.20 0.25 0.15 0.10 0.30 Compute the mean, variance, and standard deviation of X. (Round your answers to two decimal places.) mean variance standard deviation
The probability distribution of a random variable X is given. -198 -195 -191 -188 -185 p(X...
The probability distribution of a random variable X is given. -198 -195 -191 -188 -185 p(X x) 0.20 0.25 0.30 0.15 0.10 Compute the mean, variance, and standard deviation of X. (Round your answers to two decimal places.) mean variance standard deviation Need Help? Read it
An Instructor has given a short quiz consisting of two parts. For a randomly selected student,...
An Instructor has given a short quiz consisting of two parts. For a randomly selected student, let x = the number of points earned on the first part and the number of points earned on the second part Suppose that the joint pmf of X and Y is given in the accompanying table. p(x, y) 0 5 10 15 0 0.01 0.06 0.02 0.10 5 0.04 0.14 0.20 0.10 10 0.01 0.15 0.16 0.01 (a) Compute the covariance for X...
The pmf of the amount of memory X (GB) In a purchased flash drive is given as the following. 2 4 8 16 p(x)0.05 0.10 0.30 0.40 0.15 (a) Compute E(X). (Enter your answer to two decimal places.) 7.05 (b) Compute V(X) directly from the definition. (Enter your answer to four decimal places.) 69.2500 c) Compute the standard deviation of X. (Round your answer to three decimal places.) 4.811 X GB (d) Compute V(x) using the shortcut formula. (Enter your...
12.-14 points DevoreStat9 3.E.029 The pmf of the amount of memory X (GB) in a purchased flash drive is given as the following. 1 2 4 83 16 p(x) 0.05 0.15 0.30 0.450.05 (a) Compute E(X). (Enter your answer to two decimal places.) GB (b) Compute V(X) directly from the definition. (Enter your answer to four decimal places.) (c) Compute the standard deviation of X. (Round your answer to three decimal places.) GB (d) Compute V(x) using the shortcut formula....
1. The probability distribution of the amount of memory X (GB) in a pur- chased flash drive is given below. X 1 .05 2 4 8 16 .10.35 | .40.10 p(x) Compute the following: E(X), E(X2), V(X), E(3X + 2), E(3X² + 2), V(3x + 2), E(X+1), V(X + 1). 2. The n candidates for a job have been ranked 1, 2, ..., n. Let X =the rank of a randomly selected candidate, so that X has pm f n...
An instructor has given a short quiz consisting of two parts. For a randomly selected student, let X-the number of points earned on the first part and Y joint pmf of X and Y is given in the accompanying table. the number of points earned on the second part. Suppose that the 0.02 0.04 100.01 0.15 10 0.02 0.20 0.15 15 0.10 0.10 0.01 0.06 0.14 (a) Compute the covariance for X and Y. (Round your answer to two decimal...
A tidal wave or tsunami is usually the result of an earthquake in the Pacific Rim, often 1000 or more miles from Hawaii. Tsunamis are rare but dangerous. Many tsunamis are small and do little damage. However, a tsunami nine meters or higher is very dangerous Civil Defense authorities sound an alarm telling people near the beach to go to higher ground. About 30% of all recorded tsunamis have been nne meters or higher t You are writing a report...
An instructor has given a short quiz consisting of two parts. For a randomly selected student, let X = the number of points earned on the first part and Y - the number of points earned on the second part. Suppose that the joint pmf of X and Y is given in the accompanying table. plx, y) 0 5 10 15 0 0.02 0.06 0.02 0.10 X 5 0.04 0.15 0.20 0.10 10 0.01 0.15 0.14 0.01 (a) Compute the...
Rate of Return if State Occurs State of Probability of Economy State of Economy Stock A Stock B Stock C Boom 0.10 0.18 0.48 0.33 Good 0.30 0.11 0.18 0.15 Poor 0.40 0.05 -0.09 -0.05 Bust 0.20 -0.03 -0.32 -0.09 a. Your portfolio is invested 25 percent each in A and C and 50 percent in B. What is the expected return of the portfolio? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal...
he probability distribution of a random variable x is given. -196 -195 191 -189 -185 p(X = x) 0.20 0.25 0.15 0.10 0.30 Compute the mean, variance, and standard deviation of X. (Round your answers to two decimal places.) mean variance standard deviation
The probability distribution of a random variable X is given. -198 -195 -191 -188 -185 p(X x) 0.20 0.25 0.30 0.15 0.10 Compute the mean, variance, and standard deviation of X. (Round your answers to two decimal places.) mean variance standard deviation Need Help? Read it
An Instructor has given a short quiz consisting of two parts. For a randomly selected student, let x = the number of points earned on the first part and the number of points earned on the second part Suppose that the joint pmf of X and Y is given in the accompanying table. p(x, y) 0 5 10 15 0 0.01 0.06 0.02 0.10 5 0.04 0.14 0.20 0.10 10 0.01 0.15 0.16 0.01 (a) Compute the covariance for X...
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