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In given problem, suppose that the population standard deviation is 1.0 and that the true average reduction in consumption for the entire population in the area is µD = 0.1. For a sample size of 60 and α = 0.01, what is the power of the test?
ProblemA study is undertaken to determine how consumers react to energy conservation efforts. A random group of 60 families is chosen. Their consumption of electricity is monitored in a period before and a period after the families are offered certain discounts to reduce their energy consumption. Both periods are the same length.
The difference in electric consumption between the period before and the period after the offer is recorded for each family. Then the average difference in consumption and the standard deviation of the difference are computed.
The results are D‾ = 0.2 kilowatt and SD = 1.0 kilowatt. At α = 0.01, is there evidence to conclude that conservation efforts reduce consumption?
Set a value for the level of significance to be used in the test? After answering this question, what type of error would you suppose may result in that case?
1. Calculate the residuals from the least-squares fitted model for the pH mea surement data set phmeas .txt and plot them against the fitted values. What does this indicate about the fitted model?
Create a drawing or plan for a 2 x 3 experimental design that would lend itself to a factorial ANOVA. Be sure to identify the independent and dependent variables.
The time between the arrival of electronic messages at your computer is exponentially distributed with a mean of two hours.(a) What is the probability that you do not receive a message during a two-hour period?
More than 19 of them eat this brand of cereal 3) between 12 and 17 (inclusive) of them eat this brand of cereal? 4) find the mean and standard devation.
Find the proportion of working days in which anywhere from 750 to 850 tons is mined. Find the probability that on a given day, the yield will be below 665 tons.
In Excel, which of the following functions is used to conduct a hypothesis test (using the p -value) for a population variance
Convert these data to relative frequency distributions, one for the total United States, the other for the western states. Do the results appear to suggest any differences between total U.S. prices and those in the western states?
Twenty-three faculty members volunteered. Each faculty member gave the survey to all the students in one course of their choosing. Would this sampling method be considered a cluster sample? Why or why not?
the estimate of the population proportion is to be within plus or minus .04 with a 98 percent level of confidence. the
Find the critical value for different types of sample size and level of significance:
a. What is the probability that one hour of the lunch rush has no orders returned? b. The lunch rush lasts two hours. What is the probability that exactly six orders are returned during the lunch rush?
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