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The principal of a middle school claims that annual incomes of the families of the seventh-graders at his school vary more than the annual incomes of the families of the seventh-graders at a neighboring school, which have variation described by s = $13,700. Assume that a hypothesis test of the claim has been conducted and that the conclusion of the test was to reject the null hypothesis. Identify the population to which the results of the test apply.
Using this information, develop the following foundational components for a proposed analysis:
Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is
The population standard deviation has been estimated as being 40 grams. In order to have 99% confidence that the sampling error in estimating μ is no more than 5 grams, what sample size will be necessary?
Make a forecast for 2005, using a trend model of your choice or a judgment forecast. Discuss. Note: Time increments are 5 years, so use t = 6 for your 2005 forecast.
Hospitials having fewer that 1000 discharges is estimated from a simple random sample of size 25. Use the central limit theorem to sketch the approximate sampling distribution of the estimate.
Analyze the Descriptive stats for each numeric variable, Histogram for each numeric variable, Bar chart for each attribute (non numeric) variable and Scatter plot if the data contains two numeric variables.
count the number of sequences of 5 as 6 bs and 7 cs in which the first a occurs somewhere before the first
(a) Compute the probability distribution function for P r(x = r), as r = 1..12.
a. What is the intersection of two events? b. What is the probability of "one event and another" if you know
a) Give a 95% confidence interval for the true proportion of heads that this coin yields using Wald, score, and Wilson methods.
Develop a relative frequency and a cumulative relative frequency distribution for the weights using the same five classes created in part b.
A customer from Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 80 oranges, of which 6 are rotten. What is the probability that the sample contains 1 or more rotten oranges? (Round your answer to three decimal..
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