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In a speech to the Chamber of Commerce, a city councilman claims that in his city less than 15% of the adult male population is unemployed. A subsequent check taken by a newspaper reporter showed that among 300 adult males polled, 36 were unemployed. Is there sufficient evidence to support the councilman's claim at a level of significance of .05?
Calculate and interpret standard error of estimate se and coefficient of determination R2 for these data.
Select a random variable to represent the category. Produce a probability mass function for that variable, and use it to compute the mean, the median and the variance of the data in the data set. Show the probability mass function, both in tabular..
Support your contention with three examples from your experience at other organizations or departments. Where applicable, for each example, indicate what are the treatments and blocking variables.
For a given confidence interval, what is the interpretation of a 96% confidence level?
A scientist examined the effect of temperature and catalyst on the yield of a reaction. He ran the experiment at both 150° and 200°C with two types of catalyst.
If a baseball player's batting average is 0.340 or 34%, find the probability that the player will have a bad season and only score at most 60 hits in 200 times at bat?
Please define correlation and regression. Describe a management or business-related scenario where a researcher might be interested in whether a number of variables are correlated (without any assumptions about causation).
Determine whether there is a significant difference in mean temperatures in three cities using ONE-WAY ANOVA. Determine whether there is significant difference in mean temperatures.
Walleye is a common game fish. Adult walleye have a length with a mean of 44 cm and a standard deviation of 4 cm and the distribution of lengths is approximately Normal. What fraction of walleye are between 40 and 48 cm in length?
A person is considering purchasing the stock of two home health companies that are similar in all respects except the proportion of earnings paid out as dividends.
Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern.
Use the value 20 for the population standard deviation of scores on this subsection.
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