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Plot x = years after 1974 against GNP, and use the plot to describe how to fit a curve that could be used to predict GNP during future years.
Assigment was to Regress Onlinepop against PC's, Phones, and Educ and then to regress the predicted values of the dependent variable.
The slop of the regression line indicates that for every penny increase in price, she reduces her sales by about 0.26kg a day.
Perform power regression on these data, and then choose the one option describing a situation which these data could represent.
Demonstrate using regression functions by explaining what a regression function is and the factors which should be considered when interpreting results.
In California in 1990 the population was 29, 839, 250. what is the prediction of california's population in the long-run?
During 2002 the number of beds required per day at St Hallam's hospital was normally distributed with a mean of 1800 and a standard deviation of 190.
The data below present the results of a hydrological investiagtion of the snake river watershed.
What this function tells you about the relationship between the price and the number of cups sold?
Predict the monthly advertising cost when the number of orders is 4,999,000. (Hint: Be very careful with assigning the dependent variable for this problem) .
A random sample of light bulbs had a mean life of xbar = 587 hours. the standard deviation of the lifetime of all such light bulbs is of sigma = 36 hours
A car manufacturer has four plants, say Plants A,B,C and D. The CEO would like to know if worker ratings differ among the four plants.
Let the amount spent be the dependent variable and monthly income the independent variable. Create a scatter diagram, using a software package.
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college
A researcher reads that the marital status of U.S. adults is distributed as follows: marries, 60%; single, 24%; divorced,10%; widowed 6%.
Calculate what the estimated monthly return for TWCUX would be if the monthly return for the S&P 500 were 15%.
Use these data to develop an estimated regression equation that could be used to predict the price of a hydration system given its weight.
M&Ms has more recently updated its color distribution pattern to Red: 13%, Yellow: 14%, Green: 16%, Orange 20%, Blue: 24%, Brown: 13%.
In a survey for its advertisers, a newspaper chain randomly sampled 100 readers of each of its 3 major newspapers, with the results.
Is it 95%-certain that the three mean scores of all potential players below 20, all potential players between 20 and 40, and all potential players.
A survey finds that, given the choice, 34 females prefer makes much taller than themselves, and 55 females prefer males only slightly taller than themselves.
What do you know about regression analysis? What is the regression analysis good for?
In a sample of 664 patients who received this training, suppose that 47 showed reduced allergic reactions and 17 showed increased allergic reactions.
The Iowa Department of Transportation is concerned with the use of cellphones while driving.
Use exponential smoothing with and the smoothed forecast for July is 32 and determine August and September's smoothed forecasts.