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Correlation and Simple Regression. May Brothers Department Store has conducted a survey to learn the buying intentions of a sample of 62 department store customers. The survey asked each customer their household gross income (in $ thousands), and their number of shopping trips per year.
A. Interpret the coefficient of correlation between the TRIPS and INCOME variables of 0.8.
B. Interpret the following results for a simple regression over this sample where TRIPS is the dependent Y variable and INCOME is the independent X-variable: The regression equation is: TRIPs = 0.5 + 0.1 INCOME Predictor Coef Stdev t ratio Constant 0.48 0.30 1.6 INCOME 0.10 0.05 2.0 SEE = 0.3 R2 = 64% R2 = 63.4% F statistic = 106.7
What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments? What is the probability that a randomly chosen stock investor also invests in fixed income instruments?
using probability how can you use probability to improve your chances of winning at a casino. provide specific examples
A question has these possible choices - excellent, very good, good, fair, and unsatisfactory. How many degrees of freedom are there using the goodness-of-fit test to the sample results?
You have two unbiased estimates, e 1 and e 2 , of a quantity with variances V 1 and V 2 respectively, and covariance Cov {e1,e 2 } = C. Form a new unbiased estimate:
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
in a chemical processing plant it is important that the yield of a certain type of batch product stay above 80. if it
They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
A person is considering purchasing the stock of two home health companies that are similar in all respects except the proportion of earnings paid out as dividends.
The sample mean difference was 0.41 and Sd was 0.387.
Let R be a principal ideal domain and let M be a torsion R-module. Prove that M is irreducible iff M=Rm for any nonzero element m in M where the annihilator of m is a nonzero prime ideal (p)
In addition, the gender of the respondent is noted. After analyzing the results the following table of joint probabilities was produced: Find the probability that a customer who rates Windsor as excellent is a man. 0.45
for the table that follows answer the following questionsx y1 -62 -103 -144- would the correlation between x and y in
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