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A newspaper article about the results of a poll states: "In theory, the results of such a poll, in 99 cases out of 100 should differ by no more than 5 percentage points in either direction from what would have been obtained by interviewing all voters in the United States." Find the sample size suggested by this statement.
Under what conditions should you use the McNemar test? Under what conditions should you use the Kruskal-Wallis rank test?
Given that the test has a mean of 1000 and a standard deviation of 200 what is the lowest possible score needed for acceptance?
find a 95 confidence interval for the slope in each of the following settings note it is y careta. n 25 y 5.3 1.10x
the management of macij corporation is trying to determine the amount of each of two products to produce over the
Ten percent of the items produced by a machine are defective. Out of 15 items chosen at random. What is the probability that exactly 3 items will be defective?
a two-tailed test was conducted to determine if the mean age of gymnasts was equal to 16. the test value was 2.04 and
The hiker has no map and makes random choices of trail and subtrail. What is the probability of reaching the destination?
What is the difference between an independent and a dependent variable? Does a regression model imply causation? Why or why not?
The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the following results:
For this purpose, a random sample of 55 plots, each of size 100 square meters, is used. The number of ferromagnetic artifacts for each plot is determined.
Suppose we wish to estimate the population mean using a confidence interval. When is it appropriate to use a z-score? When is it appropriate to use a t-score?
a researcher wishes to determine whether happiness and marital status are dependent from one another. the table below
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