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A regional director responsible for business development in the state of pennsylvania is concerned about the number of small business failures. If the mean number of small business failures per month is 10, what is the probability that exactly four small businesses will fail during a given month? Assume that the probability of a failure is the same for any two months and that the occurrence or nonoccurrence of a failure in any month is independent of failures in any other month.
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet.
Change the frequencies to percentages - is there a group more likely to get high salaries.
A random group of apartments was selected from a city to analize the number of bedrooms they have. Is there evidence to reject the hypothesis that the apartments are equally distributed between 1 bedroom, 2 bedroom, and 3 bedroom apartments, at al..
If the standard deviation of the process is unknown, another approach is to use the sample range as a measure of process variability. Calculate the control limits for the above process using the sample range.
Sketch a histogram of these data and give the modal class.
Do men and women have different beliefs on the ideal number of children in a family? Based on the following GSS2008 Data and the obtained t statistics, what would you conclude?
The National Collegiate association (NCAA) reported that the mean number of hours spent per week on coaching and recruiting by college football assistant coaches during the season 70.
Ball bearings are manufactured with a diameter of 5 mm. But the process has variation, so the diameter is normally distributed with a mean of 5 mm and a standard deviation of .02 mm. A) What proportion of ball bearings are more than 5.03 mm?
The following data set shows the ages of the first 7 presidents and the 7 most recent presidents including President Obama. Find the mean, median, and range for each of the two data sets.
Provide an example and state the Null and the Alternative hypothesis for the example in symbolic form.
Which promises the profit of $24,000 with the probability of .7 or a loss (due to bad weather, strikes, and such) of $8000 with the probability of .3. Determine the expected profit?
A random sample of 15 Golden Retrievers has an average weight of 66 lb. The percentile rank of this sample is: A.85. B.10. C.90. D.80. E.93.
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