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The 2009 National Assessment of Educational Progress (NAEP) gave a mathematics test to a random sample of eighth-graders in Texas. The mean score was 287 out of 500. To give a confidence interval for the mean score of all Texas eighth-graders, you would use?
Find a 99% confidence interval for the population mean number of weekly miles.
Do you benefit by using a cum sum chart rather than a control chart?
Construct a 95% confidence interval for the proportion and calculate the P value for the given test.
Consider the following situation describing layoffs at a manufacturing plant of the Monsanto Company. Does there appear to be a case of age discrimination between those laid off and those non-laid off?
Based on this survey, what conclusions can you reach about the use of the Internet at work.
What is the probability that all 3 would iPods from best buy? Or at least one would have iPod from best buy?
According to Bienayme-Chebyshev rule, what percentages of these funds are likely to be within ±2 standard deviation of mean?
Then test to see whether it considerably varies from 0 [use alpha = 5%]. Don't forget to identify the null and alternative hypotheses.
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
A survey of the number of calls received by a sample of Southern Phone Company subscribers last week revealed the following information.
Obtain a test statistic and p-value assuming equal variances. Interpret these results.
Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work so I can see how to do this for the future. This one is good example of what I can do in future for real estate.
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