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The manufacturer of a spot remover claims that his product removes 90 percent of all spots. If, in a random sample, only 174 of 200 spots were removed with the manufacturer's product, test the null hypothesis θ = 0.90 against the alternative hypothesis θ
1 suppose that 5 of cereal boxes contain a prize and the other 95 contain the message sorry try again. if a person
How large a sample of one-bedroom apartments would be needed to estimate the mean within $20 with 90% confidence?
Imagine you are working as a tax professional that has been hired by a foreign corporation to develop a strategy to eliminate taxes on profits generated in the U.S. Suggest a strategy for your client to minimize its tax obligations to the U.S.
a sample of 100 people is classified by gender malefemale and by whether or not they are registered voters. the sample
Random sample with a normal distribution with a mean of 60,000 and standard deviation of 2300. What warranty should the company us if they want 96% of the tires to outlast the warranty?
She then selects a sample of 102 football players and finds that their average math SAT is 460. Use alpha =.01 to perform the appropriate hypothesis test.
a. For a classification table using the sample proportion of 0.642 as the cutoff, report the sensitivity and specificity. Interpret.b. Form a ROC curve, and report and interpret the area under it.
During 2007, sales of new, privately owned homes in the total United States and in the western states were broken down into price categories as follows: Source:
What source of variation is found in an ANOVA summary table for a with in subjects design that is not in in an ANOVA summary table for a between subjects design. What happens to this source of variation in a between-subjects design?
Calculate the number of classes and class width. Construct a frequency distribution, including the relative frequency. Construct a histogram or bar graph (depending on your answer to part a), including all labels.
Find a 90% confidence interval for the population mean weight of all such turtles.
suppose we roll a fair die two times. a. how many different samples are there? b. list each of possible samples.
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