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The regression line yˆ2 = 3 + 2x has been fitted to the data points (4,8), (2,5), and (1,2). The residual sum of squares will be:
Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
What is the probability you pick a plum and Which of the following is a legitimate probability distribution for this situation
Comparing the results from (a) and (e), what happens to the required sample size when we increase the confidence level?
If Z = 1.96, s = 3, and E = 1, determine the correct sample size.
Construct a 99% confidence interval estimate of the population mean amount of paint in a 1-gallon can.
Compare the percentage found in b) to percentage given by Empirical Rule and Chebyshev's Rule. (Make a table 3 x 3).
Now we would like to evaluate regression equation for X using Y as independent variable.
A two-way ANOVA model was used to analyze an experiment with two levels of one factor, three levels of a second factor, and 6 observations per treatment combination.
Assume that demand for the upcoming weekend is normally distributed with a standard deviation of 30.
A random variable X that has pmf given by p(x) = 1/ (n+1) over the range Rx = {0,1,2,...,n} is said to have a discrete uniform distribution. Find the mean and variance of this distribution.
Calculate the range, variance, and standard deviation for these sample data.
A recent study found that the average life expectancy of a person living in Africa is 53 years with a standard deviation of 7.5 years. If a person in Africa is selected at random
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