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Sullivan Statistics Survey: Deficit Reduction In the Sullivan Statistics Survey, respondents were asked, "Would you be willing to pay higher taxes if the tax revenue went directly toward deficit reduction?" Treat the respondents as a simple random sample of adult Americans.
(a) What proportion of the males who took the survey is willing to pay higher taxes to reduce the deficit? What proportion of the females who took the survey is willing to pay higher taxes to reduce the deficit?
(b) Is there significant evidence to suggest the proportions of males and females who are willing to pay higher taxes to reduce the deficit differs at the a = 0.05 level of significance?
U1, U2,... are independent identically distributed uniform random variables with parameters 0 and 1. (a) Let Xi = - ln Ui. What is P[Xi > x]?
Normally distributed with a mean of $70,000 and a standard deviation of $20,000. Twenty percents of the loans are larger than what amount?
Calculate the z - scores for the three samples, compare the z score to the t-statistic, is the null hypothesis accepted or rejected?
You are asked to test the CFO's claim by examining monthly profits from the sample mega stores using the Z-test. State the decision rule using α = 0.05 significance level?
question the statistical mean can be used to measure various aspects of the teen market including amount spent age of
Which of the following variables is quantitative? A stem-and-leaf diagram is constructed by separating each value of a data set into two parts. What are these parts
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Compute the first quartile the third quartile and the interquartile range.List the five-number summary.Construct a boxplot and describe its shape.
The next table shows the results of this independent t-test. At the .05 significance level, can we conclude that there is a difference in their mean times? Explain these results to a person who knows about the t test for a single sample but is unf..
A sample of 40 random weeks finds a weekly loss mean of $3200 with a standard deviation of $750. Test their claim at the a=0.05 level.
The manufacturer of a coffee dispensing machine claims the ounces per cup is normally distributed with population mean equal to 8 ounces and standard deviation equal to 0.9 ounces. If 50 cups of coffee were measured, what is the possibility that- ..
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