A building has two elevators, an express elevator and a standard elevator. Let X be the number of passengers using the express elevator every hour, and let Y be the number of passengers using the standard elevator every hour. Assuming that μX = 55 and μY = 32, what is the mean of Z, the total number of passengers using the elevators each hour?

The Coff-E-Cup beverage company has opened two franchises in town. They put one location in the center of town and one at the west end of town. Let X be the number of customers that enter the center of town location in an hour, and Y be the number of customers that enter the location at the west end of town in an hour. Assuming that μX = 65 with σX = 4.3 and μY = 45 with σY = 3.2 , what is the mean of Z, the total number of customers that enter these locations in an hour?

A national park has 2 entrance gates, one at the north end and a second gate at the south end of the park. Let X be the number of cars entering the North gate per hour and let Y be the number of cars entering the South gate per hour. Assume that X is random variable with mean μx = 23 and standard deviation σx = 3. Assume Y is a random variable with mean μy = 18 and standard deviation σy = 4. Assume that the two gates operate independently.What is the mean of Z, the total number of cars entering the park each hour?

A big department store has two entrance doors, one on 5th Ave. and the other on 6th Ave. The number of shoppers who enter the store through the 5th Ave. door in an hour, X, has mean of μX = 25 and standard deviation σX = 5, and the number of shoppers who enter the store through the 6th Ave. door in an hour, Y, has a mean of μY = 35, and standard deviation of σY = 8. Let the random variable T be the total number of shoppers who enter the store in an hour.What is μT, the mean of T?30421060Assuming that shoppers enter the store through the two doors independently, what is σT, the standard deviation of T?1389sqrt(13), or the square root of 13sqrt(89), or the square root of 89

uestion 2Select one answer.10 pointsThe number of computer monitors manufactured per day by CompScreens Inc. is a random variable X, with a mean μx = 120 and a variance of σ2x = 36. The cost of manufacturing the monitors is $500 base cost plus $15 per monitor.What is the variance of the total cost per day for CompScreens Inc. to manufacture computer monitors? 540 1040 8100 8600Question 3Select one answer.10 pointsA building has two elevators, an express elevator and a standard elevator. Let X be the number of passengers using the express elevator every hour, and let Y be the number of passengers using the standard elevator every hour. Assuming that μX = 55 and μY = 32, what is the mean of Z, the total number of passengers using the elevators each hour? 23 32 55 87Question 4Select one answer.10 pointsThe Coff-E-Cup beverage company has opened two franchises in town. They put one location in the center of town and one at the west end of town. Let X be the number of customers that enter the center of town location in an hour, and Y be the number of customers that enter the location at the west end of town in an hour. Assuming that μX = 65 with σX = 4.3 and μY = 45 with σY = 3.2 , what is the mean of Z, the total number of customers that enter these locations in an hour? 55 110 20 65 45Question 5Select one answer.10 pointsSafari Adventure Theme Park is a self­guided theme park in which people drive through a park filled with African wildlife. They are given a map and a written guide to the wildlife of the park. They charge $20.00 per car plus $2.00 per person in the car. The number of people per car can be represented by the random variable X which has a mean value μX = 3.2, and a variance σ2x = 1.4. What is the mean of the total amount of money per car that is collected entering the park? $66.00 $26.40 $22.00 $6.40

Heights of People (m)The number of standard deviations from the mean is also called the "Standard Score","sigma" or "z-score"how many standard deviations 1.85 is from the mean ????????How far is 1.85 from the mean?It is 1.85 - 1.4 = 0.45m from the meanHow many standard deviations is that? The standard deviation is 0.15m, so:0.45m / 0.15m = 3 standard deviations−= XZ