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For the following sample of n 5 4 scores: 82, 88, 82, and 86:
a. Simplify the arithmetic by first subtracting 80 points from each score to obtain a new sample of 2, 8, 2, and 6. Then, compute the mean and standard deviation for the new sample.
b. Using the values you obtained in part a, what are the values for the mean and standard deviation for the original sample?
Describe the sampling distribution of p-hat, the sample proportion of college students with the cell phones who send or receive the text messages with their phones.
in one particular race there are 7 people 3 of which are runners of the track coach. the race is so competitive that
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find ex where x is the outcome when one rolls a six-sided balanced die.find the mgf of x. also using the mgf of x
michaels teacher informed him that his score of 98 on the last algebra test corresponded to a z-score of -2.12. which
suppose that x has a normal distribution and y expx.a derive the pdf of y.b compute py ?
a businessweek north american subscriber study collected data from a sample of 2861 subscribers. fifty-nine percent of
The university police department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows Poisson distribution with a mean of 9 tickets per day.
What are three lessons you learned relative to ANOVA and nonparametric tests? As a result of using this simulation, what concepts and analytic tools will you be able to use in your workplace (i.e., how do you expect to apply what you learned)?
Determine standardized test statistic z and its corresponding area. If convenient use technology. z=( ) round to two decimals. Area= ( ).
an analyst is interested in testing whether four populations have equal means. the following sample data have been
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
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