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The results of a recent poll on the preference of voters regarding the presidential candidates are shown below. Voters Surveyed Voters Favoring This Candidate Candidate A 200 150 Candidate B 300 195
a. Develop a 90% confidence interval estimate for the difference between the proportion of voters favoring each candidate.
b. Does your confidence interval provide conclusive evidence that one of the candidates is favored more? Explain.
What is the probability that a randomly selected assembly line worker earns more than $22,000? What is the probability that the average salary of 5 assembly line workers is higher than $22,000?
the amount of each active ingredient in 1 pound of each chemical are given in the file P15_74.xlsx. It is necessary that at least 100 pounds of chemical 2 be used. Determine the cheapest way of producing today's batch of NasaMist
question a recent study examined the number of unemployed people in 5 cities who are actively seeking employment. at
What are the implications to a business if the forecast is too high - show a graph of the historical and forecasted sales in one graph
If appropriate, find a 90% confidence interval for the population of all Americans who consider that the amount of federal income tax they pay as too high.
Joan's nursery specializes in custom-designed landscaping for residential areas. the estimated labour cost associated with a particular landscaping proposal is based on the number of plantings of trees,shrubs and so on to be used for the project.
Conduct a two-sample test of means. A study by a bank compared the average savings of customers who were depositors for three years or less with those who had been depositors for more than three years.
Distributed with the following parameters: μ1 = 100, σ1 = 4, μ2 = 75, σ2 = 4, μ3 = 75, and σ3 = 2. What is the probability that an assembly chosen at random will have combined dimension in excess of 262?
Agency wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples. how many different samples are possible?
consider taking samples of size 25 from a population with proportion 0.65.a find the mean of the distribution of sample
Stating assumptions on which your arguments and conclusions are based, sum up the statistical evidence regarding effectiveness of this diet.
You just finished getting your data, made sure there were no fliers and the data was correct You created a mean and standard deviation and ran your Z test at the 0.05 alpha Your decision rule is 1.645 and your Z test statistic ( step 3 ) is 1.647
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