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19. A consumer analyst collected the following data on the screen sizes of popular LCD televisions sold recently at a large retailer:a. Does there appear to be a linear relationship between the screen size and the price?b. Which variable is the "dependent" variable?c. Using statistical software, determine the regression equation, interpret the value of the slope in the regression equation.d. Include the manufacturer in a multiple linear regression analysis, using a "dummy" Hint You will need to us a set of indicator variables.f. Make a plot of the residuals and comment on whether they appear to follow a normal distribution.e. Plot the residuals versus the fitted values. Do they seem to have the same amount of variation?
Using the original data, estimate the population standard deviation with 90% probability.
The one time fling. Have you ever bought the article of clothing (dress, sports jacket, etc.) worn item once to a party, and then returned purchase?
if Susan constructs a small station and the market is good, she will realize a profit of $50,000.What is the maximax decision? What is the Hurwicz (criterion of realism) decision with α = 0.8?
The chart at the right. Does this sample indicate that songs classified as dance music have lower beats per minute than the songs ranked on a Top 200 list?
Please use the five-step process for hypothesis testing. The Connecticut Board of Education is concerned that first year female high school teachers are receiving lower salaries than their male counterparts.
Conditional and compound probabilities.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
What is the probability that a U.S. user who downloads music, selected at random, obtained it from either the United States or Canada.
I believe this can be done by plotting out every 3 years average number of people working past 65 since 1997 until now and then making a predictability study as to number of people who will be working over the age of 65 in 2012.
A researcher selected a sample of 50 residents from each of three different cities to determine if they were willing to participate in a medical experiment. At a = .05, test the claim that the proportions who will participate are equal.
The sample mean talk time was 315 minutes with a standard deviation of 24 minutes. Why can we say that the sampling distribution of x is approximately normal?
Which of the following studies used a participant observer approach?
Top management earn between $50,000 and $100,000 per year. A histogram of all salaries would have which of the following shapes?
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