With the use of biofuels increasing, investigators are looking for ways in which the wood ash that is a byproduct of biomass combustion can be used. An experiment described in the paper "Wood Ash Admixture to Organic Wastes Improves Compost and Its Performance" looked at the effect of using wood ash in compost. Composts with 0%, 8%, and 16% ash were applied to plots in an experimental field. The plots were grouped into four blocks to create blocks that consisted of plots with similar soil characteristics. Treatments (the three composts) were assigned at random to the plots within each block. At the end of the composting period, the concentration of lead (mg/kg) was measured.

Use the accompanying data (consistent with summary quantities given in the paper) to determine if there is evidence that the mean lead concentration differs for the three ash concentrations. Use α= 0.01.

Block 0% Ash 8% Ash 16% Ash
1 61.4 39.0 34.7
2 57.2 41.0 38.2
3 58.0 38.5 34.7
4 63.5 40.3 33.4

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Select the correct answer from each drop-down menu. the table shows the annual sales revenue for different types of automobiles from three automobile manufacturers. sales revenue (millions of dollars) suv sedan truck marginal total b & b motors 22 15 9 46 pluto cars 25 27 10 62 panther motors 26 34 12 72 marginal total 73 76 31 180 the company with the highest percentage of sales revenue from sedans is . of the annual sales revenue from suvs, the relative frequency of pluto cars is .

Overproduction of uric acid in the body can be an indication of cell breakdown. this may be an advance indication of illness such as gout, leukemia, or lymphoma.† over a period of months, an adult male patient has taken nine blood tests for uric acid. the mean concentration was x = 5.35 mg/dl. the distribution of uric acid in healthy adult males can be assumed to be normal, with σ = 1.87 mg/dl. (a) find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. what is the margin of error? (round your answers to two decimal places.) lower limit upper limit margin of error (b) what conditions are necessary for your calculations? (select all that apply.) σ is unknown n is large σ is known normal distribution of uric acid uniform distribution of uric acid (c) interpret your results in the context of this problem. there is not enough information to make an interpretation. the probability that this interval contains the true average uric acid level for this patient is 0.05. the probability that this interval contains the true average uric acid level for this patient is 0.95. there is a 95% chance that the confidence interval is one of the intervals containing the population average uric acid level for this patient. there is a 5% chance that the confidence interval is one of the intervals containing the population average uric acid level for this patient. (d) find the sample size necessary for a 95% confidence level with maximal margin of error e = 1.10 for the mean concentration of uric acid in this patient's blood. (round your answer up to the nearest whole number.) blood tests