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PART 1
Shown below are the sales revenue and advertising cost data for seven companies published by International Advertising Age.
Use the above data to develop a regression line to predict the amount of advertising by sales. Compute the ‘r2' from the regression output.
Discuss, in at least 150 words, regression models and identify their relative strengths and weaknesses.
PART 2
The International Agricultural Producers publishes annual data on various selected farm products. Shown above are the unit productions figures (in millions of bushels) for three farm products for 10 years.
Use this data and multiple regression analysis to predict corn production by the production of soybeans and wheat.
Using 150 words or more comment on the results of your data analysis.
At a 0.05 level of significance, determine if there is a significant difference in the mean weekly units of production for the three types of work schedules (perform all six steps of hypothesis testing and show the ANOVA table).
Can you provide an example using your own data set (two related and unrelated variables) of at least twenty numbers each and apply the formula of correlation. Determine the correlation of each of the two sets of data.
Maria Gomez, a research analyst in the state department of health, has undertaken a study of the possible consequences of overbuilding hospital facilities.
Calculate the mean number and median number of apples in a bag.
The County Executive for Monroe County is concerned about the response time for the three fire companies in the county. Samples of the response times (in minutes) for each company follow. At the 0.05 significance level is there a difference in the me..
Each scenario involves randomly selecting n i observations from four, independent, Normal populations as described.
In a sample of 210 men, 35 prefer sugar free soft drinks. In a sample of 220 women, 42 prefer sugar free soft drinks. Using a significance level of 0.05, test whether women prefer sugar free drinks more than men. Calculate the p-value.
I read that a range of expression is a set of values of a given expression. This set may consist of the whole set of cardinals numbers xy or of a proper subject of the set of cardinals (as the expression 2x, whose range is the even cardinals).
The average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
A sample of 23 European countries found that the variance of life expectancy was 7.3 years. What is the 95% confidence interval for the variance of life expectancy in Europe.
Dr Zak developed a test to measure depression. He sampled 100 university students to take his five item test. The group of students was comprised of 30 men and 70 women. In this group four persons were African American, six persons were Hispanic and ..
Determine the mean number of times the machine was used per day.
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