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As a project for their high school mathematics class, four class members purchase packages of a leading breakfast cereal for subsequent weighing and comparison with the 12-ounce label weight. The students are sur- prised when they weigh the contents of their four pack- ages and find the average weight to be only 11.5 ounces. When they write to the company, its consumer relations representative explains that "the contents of the ‘12- ounce' packages average 12.2 ounces and have a stan- dard deviation of 0.4 ounces. The amount of cereal will vary from one box to the next, and your sample is very small-this explains why your average weight could be just 11.5 ounces." If the spokesperson's information is correct, how unusual would it be for these students to get a sample mean as small as the one they obtained? Be sure to state any assumptions you have made in obtaining your answer.
Identify two variables for which you could calculate a Pearson correlation coefficient. complete solution correct answer key. Describe the variables and their scale of measurement.
Use the Rare Event Rule. Does the evidence support the claim?
In a certain pediatric population, systolic blood pressure is normally distributed with mean 115 mm Hg and standard deviation 10 mm Hg. Find the probability that a randomly selected child from this population will have:
five years ago the standard deviation of the ages of the undergraduate business students was 1.5 years. recently a
Explain the use of normal probability plot to evaluate whether a set of data is normally distributed? Please discuss in detail.
There are many nonparametric tests that have been developed over the years. Explain what nonparametric tests are and why they were developed.
The Human Relations Department of Electronics Inc. would like to include a dental plan as part of the benefits package. The question is: How much does a typical employee and his or her family spend per year on dental expenses?
jupiter media used a survey to determine how people use their free time. watching television was the most popular
A researcher wishes to construct a 95% confidence interval for a population mean. She selects a simple random sample of size n=20 from the population.
Suppose that 45 percent of the population favors a certain candidate in an upcoming election. If a random sample of size 200 is chosen, find the expected value and standard deviation of the number of members of the sample that favor the candidate..
Suppose Z has a standard normal distribution with a mean of 0 and standard deviation of 1. The probability that Z is less than -2.20 is.
Suppose the average value of P is $ 3 and average value of Po is $ 6. Determine the price elasticity at average values of P and Po?
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