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A regression of height (X, in inches) on hourly earnings (Y, in dollars), yields the following results:
n = 26SSR = 200SST = 1000r = .447
Sx = 3Sigma Yi = 780Sigma Xi = 1872
What is the value of b1 in the regression Y = b0 + b1X ?
Construct a 90% confidence interval for the proportion of all kernels that would not pop.
What is the chance that stock will fall by more than 15% next month? What extra assumption are you making when replying this question?
Explain these results to a person who understands the t test for a single sample but knows nothing about the t test for independent means.
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.
Our psychology department received a new statistics text for review. Prof. Smart in his review provided an interesting table of corrections.
On average, the size of the difference between the sample mean and the population mean is predicted by:
What is the effect of child care on the security of attachment which develops between infant and caregiver. You suspect that infants in child care will be insecurely attached at 11 months after being in a child care from 2 months of age,
In the history class the mean score was 76 with standard deviation 3.
Two events, A and B are equally likely. The chance that either A or B happens on a given trial of an experiment is 0.70, while the chance that they both happen on a given trial is only 0.40.
A multiple regression analysis includes 25 data points and 4 independent variables results in SST = 200 and SSR = 150. the multiple standard error of estimate will be?
By how much does the standard error of x-bar change if the sample is increased to 100?
Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as?
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