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A market analyst for the Weber Refrigerator Company has visited various appliance stores in a city to get data on the selling price of different brands of refrigerators. Use the following data to help determine whether the selling price in dollars is linearly related to the volume in cubic feet of the refrigerator.
Price Volume
(Y) (X)
320 15.8
580 21.3
669 24.4
480 18.2
525 19.5
420 17.5
400 16.3
550 21.0
a) Estimate the population regression equation and interpret the result
b) Calculate R2 ( R squared) and interpret the value.
If the life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age?
Assume the researcher's rats can be considered an SRS from the population of all laboratory rats. The mean Math SAT score of these students is found to be 560, 80 points higher than the national average.
By how much does the standard error of x-bar change if the sample is increased to 100?
Supposing a linear relationship, use the least squares method to find the regression coefficients b 0 and b 1 .
what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds True?
Significance level to test the claim that less than half (.5) of all executives identify that error as being the most common job interviewing error.
According to a recent survey of 500 randomly selected residents of Popular City, it was found that 38% are in favor of raising city taxes in order to build a new stadium for the local baseball team. (a) What is the population of interest of the su..
A new industrial oven has just been installed at the Piatt Bakery. To develop experience regarding the oven temperature, an inspector reads the temperature at four different places inside the oven each half hour.
Does the data prove a significant difference in mean times?
Multiple choice questions based on regression - multiple coefficient of determination
You're responsible for planning parking needed for a new 256-unit apartment complex, and you're told to base the needs on the statistic 'average number of vehicles per household is 1.9'.
Assume a one-tailed t -test is being applied to determine if population mean is less than $212. Level of significance chosen is 0.01 and 26 accounts are sampled. Determine the critical value?
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