A fast-food restaurant operates both a drive-through facility and a walk-in facility. On a randomly selected...
A fast-food restaurant operates both a drive-through facility and a walk-in facility. On a randomly selected day, let X and Y , respectively, be the proportions of the time that the drive-through and walk-in facilities are in use, and suppose that the joint density function of these random variables is f(x, y) = C(x + 2y) if 0 ≤ x ≤ 1 and 0 ≤ y ≤ 1, f(x, y) = 0 else.
(a) Determine the value of C. ANSWER: C=2/3
(b) Find the marginal distribution of X, that is, find the probability density function fX for X. ANSWER: 2/3(X+1)
*(c) Compute the expectation and variance of X.
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A fast-food restaurant operates both a drive-through facility
and a walk-in facility. On a randomly selected...
Question 17 10 pts Determine the value of c such that f(x, y) is a valid...
Question 17 10 pts Determine the value of c such that f(x, y) is a valid joint pmf of the random variables X and Y, given the values for the joint pmf below Y-2 Y 4 Y=6 X-1 0.05 0.01 0.13 X-2 0.10 0.08 0.04 X -3 0.05 0.13 C OD.41 O O.82 O 0.14 O 0.07 Question 18 10 pts Aprivately owned liquor store operates botha drive-in facility and a walk-in facility. On a randomly selected day, let Xand...
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please help. thank u The mean waiting time at the drive-through of a fast food restaurant...
please help. thank u
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Refer to the accompanying data set of mean drive-through service times at dinner in seconds at two fast food restaurants. Construct a 90% confidence interval estimate of the mean drive-through service time for Restaurant X at dinner; then do the same
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6. The mean waiting time at the drive-through of a fast-food restaurant from the time an...
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In a study of the accuracy of fast food drive-through orders, Restaurant A had 300 accurate...
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please help. thank u
The mean waiting time at the drive-through of a fast food restaurant from the time an orders placed to the time the order is received is 84 2 seconds. A manager devises a new drive through system that the believes will decrease wait time As a test the initiates the new system at her restaurant and measures the wait time for 10 randomly selected orders. The wait times are provided in the table to the right...
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Refer to the accompanying data set of mean drive-through service times at dinner in seconds at two fast food restaurants. Construct a 99% confidence interval estimate of the mean drive-through service time for Restaurant X at dinner, then do the same for Restaurant Y. Compare the results.
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