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A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in.
?(a) Determine the minimum sample size required to construct a 99?% confidence interval for the population mean. Assume the population standard deviation is 0.25 in.
?(b) Repeat part? (a) using a population standard deviation of 0.40 in. Which standard deviation requires a larger sample? size? Explain.
?(Round up to the nearest? integer.)
The following data give the diffusion time (hours) of a silicon wafer used in manufacturing integrated circuits and the resulting sheet resistance of transfer:
(Class Project) Let each student in the class respond to the question Which carbonated soft drink do you most prefer? so that the teacher can tally the results.
eleven patients were weighed before and after a diet which was designed to help patients reduce weight. eight of these
In forestry there appears to be a correlation between the diameter of a tree at breast height and the totol height of the tree. For the following sample of ten white spruces first construct a scatter plot then find the correlation (r) between heig..
In a study of several Chesapeake Bay tributaries, a random sample of nontidal freshwater locations on the Patuxent River was obtained.
which of the following nonparametric tests reaches a conclusion equivalent to the mann-whitney u test?a. wilcoxon
In 2009, the population of Hungary1 was approximated by P = 9.906(0.997)^t where P is in millions and t is in years since 2009. Assume the trend continues.
A manager of an industrial plant asserts that workers on average do not complete a job using Method A in the same amount of time as they would using Method.
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
Let X be the random variable which counts the number of cars that, in a given unit of time, pass by Joe's Barber Shop on Main Street. What is the distribution of X?
Draw a picture of the sampling distribution of H, the highest number each day, and compare it to the equivalent picture for the Cash 5 game, shown in Figure. Do you expect them to be similar? Are they?
Find a journal article online (provide link to the study). Identify the null hypothesis and the alternative hypothesis. Compare and contrast your responses.
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