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Suppose the people living in a city have a mean score of 40 and a standard deviation of 5 on a measure of concern about the environment. Assume that these concern scores are normally distributed. Using the 50%-34%-14% figures, approximately what percentage of people have a score a) above 40 b) above 45 c) above 30 d) below 45 g) below 30.
Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?
An advertising agency that serves a major radio station wants to estimate the mean amount of time that the station's audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes.
In brief describe three situations in which the 'First In First Out' discipline rule is not applicable in queuing analysis. Provide examples of four situations in which there are limited, or finite population.
Illustrate by computation that, for straight -line regression of Y on x, β1= 0.
Employ a four period moving average and determine the forecasted demand for August. Put your answer in the form xx.x with no additional numbers or symbols.
Group of businesswomen wish to open a high fashion boutique in a vacant store but only if the average income in the area is at least $45,000. Use alpha=0.01 to test whether or not the businesswomen should open their boutique in this neighborhood.
Suppose x follows a distribution with density function: f(x)=C*abs(x-2), 0 =
Using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 7.3? Fully explain your answer.
Should mean disposable income be used to predict sales based on the sample of 14 Sunflower stores? Are there any other factors not mentioned by the leasing agents that might be relevant to the store leasing decision?
What is the p-value associated with the sample results? What is your conclusion based on the p- value?
At the 0.05 level of significance, is there evidence that the average purchase is different from 10 liters? At the 0.05 level of significance, is there evidence that less than 20% of the motorists purchase super unleaded gasoline?
Six groups of randomly selected students matched for IQ and age were formed. Each student was taught a concept of time by using one of three methods: Lecture, demonstration
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