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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?
(a) What is the probability model for random variables A and B? Write the joint PMF PA,B(a, b) as a table. (b) If A = 1, what is the conditional expected value E[B|A = 1]?
The company makes a RM3 profit on the sale of any working gadget, but suffers a loss of $80 for every faulty gadget because they have to repair the unit. Let X be the profit, write the probability distribution table and check whether the company c..
Twelve randomly selected mature citrus trees of one variety have a mean height of 13.8 feet with a standard deviation of 1.2 feet, and 15 randomly selected mature citrus trees of another variety have a mean height of 12.9 feet with a standard devi..
Using suitable probability model, calculate the probability of producing more than 3 faulty chips per hour.Explain the reasons for choosing your probability model.
Determine the covariance matrix for values of this process at time t=1,2,3,4. Determine its inverse(numerically) and write formula for pdf of corresponding random vector.
Impact of Eastern European Growth The managers of Loyola Corp. recently had a meeting to discuss new opportunities in Europe as a result of the recent integration among Eastern European countries.
1. We are testing Ho: p = 0.5 vs Ha: p
1. in a hospitals shipment of 3500 insulin syringes 14 were unusable due to defects. is this sufficient evidence to
Discuss the main sources of law and how they relate to the practice of civil engineering. Discuss, with real or hypothetical illustrations, the legal issues encountered at each phase of the system development process.
The student wishes to test the null hypothesis is that there is no difference in A1C levels (the alternative hypothesis that there is a difference in A1C levels between the 2 groups). What is the critical t value for a t test that is testing the d..
you are dealt two cards successively without replacement from a standard deck of 52 playing cards. find the
two vehicles in succession are observed moving through the intersection of two streets.a list the possible outcomes
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