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Suppose the age distribution in Sydney is as follows:
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
If they didn't launch new mixing plant another alternate can contribute twenty five million profit for the same period (i.e. estimated 6 years). Draw the complete decision tree and determine whether the product should be launched or not.
Find the t c for a 90% confidence level with a sample size of 18.
An advantage of the permutation test over the t test for a difference in means, can Permutation tests be used for tests when we believe the two populations differ under the null hypothesis.
In a recent survey 35 percent indicated chocolate was their favorite flavor of ice cream. Suppose we select a sample of 10 people and ask them to name their favorite flavor of ice cream.
Find the probability that the driver was intoxicated or the pedestrian was not intoxicated?
A retailer wants to estimate with 99% confidence the number of people who buy at his store. A previous study showed that 15% of those interviewed had shopped at his store.
Determine the mean and the standard deviation of the sample.
The following data represents the running time of films produced by 2 motion picture companies. Assume these are independent samples
A random sample of 16 ages is drawn from the population, and we find the sample mean of these observations to be μ = 8.76. What is the value of the test statistic?
Three members of a club will be selected to serve as officers. The first person selected will be president, the second person will be vice-president and the third will be secretary/treasurer.
Find an integer k that the probability is at least .99 that you will find k invoices that overcharge the customer. Use trial and error with the BInomdist function to find k.
Sun Love grapefruit growers have determined that the diameters of their grapefruits are normally distrubuted with a mean of 4.5 inches and a standard deviation of 0.3 inches.
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