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The owner of a lawn care company is concerned about the amount of time one of her employees, Michael, needs in order to complete lawn fertilization service. The reason for her concern is that slow service times result in selling service packages to fewer customers, and therefore lower profits. The target time to fertilize a standard size lawn (1000 m2) is 5 minutes. The owner selects a random sample of 10 fertilization services provided by Michael and records the time it takes for him to complete each service. The times, in minutes, are as follows:
7 10 4 5 6 7 5 3 7 2.
Is there sufficient evidence to suggest that, on average, Michael exceeds the target service time? Use the p-value method toconduct an appropriate hypothesis test at the 10% level of significance. What must you assume is true in order for your conclusion to be valid?
fifty percent of the people that get mail-order catalogs order something. find the probability that only four of the 10
United Airlines established a discount airline named Ted. The managers were interested in determining how flyers using Ted rate the airline service. They plan to question a random sample of flyers from the November 12 flights between Denver and Fo..
Assume that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
a pair of dice is rolled 10 times. what is the probability that a sum of seven is observed at most three
Given the following revenue and cost function for a business firm, calculate the break-even quantity, total revenue, total cost and total profit at break-even level of production.
This week we're reading across disciplines: history, philosophy, music, art, Europe, America, Asia...welcome to the Humanities. Hence our discussion will focus on influences. How does history, the social movement of time and place, influence art?
The null hypotheseis it true? Sketch the density curve of the sampling distribution. Be sure to locate mean and standard deviationn correctly.
We wish to know if, on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African-American men is greater than 140.
A scatter diagram that plots the values of the residuals against the values of the dependent variable
Suppose four heads appeared face up on four tosses of a coin. what is the probability that a head will appear face up in the next toss of the coin?
The New York Times reported (L.J> Flynn, Tax Surfing, The New York Times, March 25, 2002, p. C10) that the mean time to download the home page for the internal Revenue Service (IRS) , was 0.8 second. Suppose that the download time was normally di..
Standard deviation of 0.17 ounces, assuming the weight of cereal is normally distributed, determine the likelihood that a package will contain more than 12.2 ounces?
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