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In a large statistics class, the professor has each student toss a coin 12 times and calculate the proportion of his or her tosses that were tails. The students then report their results, and the professor plots a histogram of these several proportions. Should a Normal model be used to represent the sampling distribution of the proportion of tails?
Write down the name of 4 parts of the regression equation.
What is predicted value for National Health Expenditure as a % for 2010? What is the 95% confidence interval for your estimate? Does the trend continue? Does year impact expenditure?
Describe appropriate treatment means μ1, μ2 and μ3. After that Test for statistically significant differences between these treatment means. Set α = 0.05.
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
State one referenced hypothesis including the three variables (FA as an IV, age as the covariate and RS as the DV)
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
A cereal manufacturer sells boxes of cereal that list the weight as 19 oz. A random sample of 60 boxes was taken, with the contents carefully weighed.
In Colorado Springs the newspaper runs mug shots of wanted criminals. The 17% of those published are arrested through information provided to the police. If 200 are published, find the probability that less than 30 are arrested.
When would you use ANOVA at your place of employment, in your education, or in politics? Please share the WORDS that would lead you to the null hypothesis for a specific and simple example
"Give an example of a statistic that you have heard quoted in the media that you do not believe is accurate either due to bias or other incorrect statistical methods. Describe the relevant population and the source (e.g. newspaper, TV, radio, inte..
Using 19 observations on each variable, a computer program generated the following multiple regression model:
Suppose it is desired to estimate the population mean number of miles with a margin of error of ± 2 miles at 95% confidence. Do the data provide this desired level of precision? What action, if any, would you recommend be taken?
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