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The following data give the results of a sample survey. The letters Y, N, and D represent the three categories.
D N N Y Y Y N Y D Y
Y Y Y Y N Y Y N N Y
N Y Y N D N Y Y Y Y
a.) Construct a frequency distribution table and a pie chart for this data.
b.) What category comprises most of the sample?
Critically illustrate out the properties of a normal distribution. Explain why there are an infinite number of normal distributions.
A four-year financial project is forecast to have net cash inflows of $20,000; $25,000; $30,000; and $50,000 in the next four years. It will cost $75,000 to implement the project
For each of the following statistical tests, state the null hypothesis and the two sided alternative hypothesis.
The following is a time series data set. Run a time-series analysis for projections of April 2009 in the Healthcare industry of Nashville.
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
Compare a three-month moving average forecast with an exponential smoothing fore-cast for a = 0.2. Which provides the better forecasts using MSE as the measure of model accuracy?
Two bags contain red, yellow and blue cubes. bag a has 12 red cubes 16 yellow and 22 blue. Bag b has 11 red 14 yellow and 20 blue. Throw wants to choose a yellow cube. which bag should he choose.
a local social service agency is asked to determine areas in the greatest need of social support. the neighbourhoods
Answer the following questions using the null hypothesis as "the individual does not have the disease." a. What is the probability of Type I error? (Round your answer to 2 decimal places.) b. What is the probability of Type II error? (Round your answ..
Suppose also that after selecting 15 members at random we obtained the following paired observations: Use these data to find the covariance between age and the number of visits.
Set up the null and alternative hypotheses to test whether the proportion of MBA students who expect to stay at their first job five years or more is less than one-fourth of all U.S. MBA students.
The average monthly gasoline purchase for a family with 2 cars is 90 gallons. This statistic has a normal distribution with a standard deviation of 10 gallons. A family is chosen at random.
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