The quality-control manager of a long john silver's restaurant wants to analyze the length of time that a car spends at the drive-through window waiting for an order. it is determined that the mean time spent at the window is 59.3 seconds with a standard deviation of 13.1 seconds. the distribution of time at the window is skewed right. a) to obtain probabilities regarding a sample mean using the normal model, what size sample is required? b) the quality-control manager wishes to use a new delivery system designed to get cars through the drive-through system faster. a random sample of 40 cars results in a sample mean time spent at the window of 56.8 seconds. what is the probability of obtaining a sample mean of 56.8 seconds or less, assuming that the population mean is 59.3 seconds? do you think that the new system is effective? treat the next 50 cars that arrive as a simple random sample. there is 15% chance the meantime will be at or below seconds?

step-by-step explanation:

first, eliminate the parenthesis:

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second, group like terms:

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third, combine like terms:

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the most boring ever written

step-by-step explanation:

i am writing something. yes, i plan to make it the most boring thing ever written. i go to the store. a car is parked. many cars are parked or moving. some are blue. some are tan. they have windows. in the store, there are items for sale. these include such things as soap, detergent, magazines, and lettuce. you can enhance your life with these products. soap can be used for bathing, be it in a bathtub or in a shower. apply the soap to your body and rinse. detergent is used to wash clothes. place your dirty clothes into a washing machine and add some detergent as directed on the box. select the appropriate settings on your washing machine and you should be ready to begin. magazines are stapled reading material made with glossy paper, and they cover a wide variety of topics, ranging from news and politics to business and stock market information. some magazines are concerned with more recreational topics, like sports card collecting or different kinds of hairstyles. lettuce is a vegetable.

55 degrees because 55+55=110 degrees