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A. What distinguishes a histogram from a bar chart?
B. What would be an appropriate graphical representation to show the dispersion of home prices in a particular city, such as San Diego? Consider what would be the dependent (y) and independent (x) variables? Explain your reasoning.
Finding the Equation of the Regression Line and Making Predictions. Find the regression equation,
If you have multiple regression output with 2 independent variables and R-Square is .9682, what does R-Square indicate?
If computing a causal linear regression model of y = a + bX and the resultant r2 is very near zero, then one would be able to conclude that:
At the 0.05 significance level, can Ms. Bridgend conclude that she is earning an average of more than $20 in tips?
She then uses the mean and standard deviation of these values to estimate the mean value for all parts the operator is making. Construct a 95% confidence interval for the mean value assuming a normal distribution.
If the true mean for Saturday sales is now $4500, what is the probability of accepting the (false) null hypothesis in (a) above (the probability of not sharing the manager's concern because of lack of evidence)?
A test of hypothesis is conducted at the .05 level of significance to test either or not the population correlation is zero.
Find the value of the standard normal random variable z, called z 0 such that:
Determine relative frequency of X=4? Generate the cumulative frequencies.
When the conditionally and unconditionally expected values of a discrete random variable would be different?
Students need a score of 60 points to pass the exam. What is the probability that a randomly selected student will pas the exam? (P(X ≥ 60))
What is the mean of this uniform distribution? What is the standard deviation?
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