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1 ) Describe what is meant by a negative relationship and a positive relationship between two variables.
2 ) A sample of n = 25 pairs of scores (X and Y values) produces a correlation of r = -0.40. Are these sample data sufficient to conclude that there is a significant non-zero correlation between X and Y in the population? Use a two-tailed test at the .05 level of significance.
3. For the data below:
a. Compute the Pearson correlation.
b. Find the regression equation for predicting Y from X.
X Y
5 10
3 6
6 7
4 3
2 4
Question : Question : Let the random variable X have the p.m.f. f(x) = ((lxl+1)^2) / 9, x=-1,0,1 Compute E(x), E(x^2), and E(3x^2-2x+4).f.
What is the lottery's expected profit per ticket?
Question 1: ABC Corporation has used regression analysis to perform price elasticity analysis. In doing so management regressed the quantity demanded (y variable) against price (x variable) with the following results:Multiple R .86798 Adjusted R squa..
a.) What is the optimal value of the objective function? More than one optimal solution can lead to the case of alternative optimal solutions, More than one solution provides the optimal value for the objective function.b.) What are the optimal value..
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Develop an ordered array and plot a percentage histogram, what conclusions can you reach about the differences in the state cigarette tax between the states?
When Susan and Jessica play a card game, susan wins 60% of the time. if they play 9 games, what is the probability that jessica will have won more games than susan?
What is the mean and standard deviation (SD) for preoperative T score for CVLT Acquisition - distribution of scores for the postoperative CVLT Retrieval T scores is normal, the middle 68% of the patients had T scores between what two values?
Which of the following formulas would you use to find the probability that a sample mean is larger than some given value? z = (x - µ) ÷ σ µ = ∑x ÷ N
Suppose we have two bowls full of candies. Each bowl contains four different flavours of candy - grape (which are purple), lemon (which are yellow), cherry (which are red) and raspberry (which are also red). (a) What is the probability that the fi..
Perform a hypothesis test to address the questions
1. ifnbspphi-z0 nbspalpha2 z0 ? assume alpha lt0.1.2. a company produces cooling tubes. the pressure of the tube is an
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