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According to the National Association of Home Builders, 62% of new single-family homes built during 1996 had a fireplace. Suppose a nationwide homebuilder has claimed that its homes are "a cross section of America," but a simple random sample of 600 of its single-family homes built during that year included only 57.5% that had a fireplace.
Using the 0.05 level of signifi- cance in a two-tail test, examine whether the percentage of sample homes having a fireplace could have differed from 62% simply by chance. Determine and interpret the p-value for the test.
What time usage guarantee (in hours) should the manufacturer advertise in order to ensure that only 4% of the cartridges fail to meet the guaranteed time usage?
How many such amplifiers connected in a cascade of identical non inverting stages would she need to achieve her goal? What is the 3-dB frequency of each stage she can use? What is the overall 3-dB frequency?
Can the company claim that they are faster than the average utility?
find the standardized test statistics t for a sample with n 12 sample mean 19.2 s 2.2 and a 0.01 if h0 u 18 round
Suppose that among workers exposed to asbestos in a shipyard in 1980, 33 died over a 10-year period from COPD, whereas only 24 such deaths would be expected based on statewide mortality rates. Is the number of deaths from COPD in this group excess..
The cost of a board failure and interruption includes the fixed cost c0 of a new board and a cost that increases proportionally to Y2. If C is the cost incurred, C = c0 + c1Y 2. Find the probability that the delivery time exceeds two days.
Find the short-run competitive equilibrium: the price per ride, number of rides per day, and the profit per cab per day. Is the taxicab market in long-run equilibrium?
One of the research focuses of the Research Farm at Ataturk University, Erzurum, Turkey, is on increasing meat quality and production in sheep.
A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days.
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
Find the probability of each value of X. Draw a histogram to display this distribution. (Because probabilities are long-run proportions, a histogram with the probabilities as the heights of the bars shows what the distribution of X would be in ver..
in each of the following find the pdf of y. show that the pdf integrates to 1.a y x3nbspand fxx 42x51-x 0ltxlt1b y
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