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Four pairs of data (n = 4) yield r = 0.942 and the regression equation y-cap = 3x. Also, the average of the y values = 12.75. What is the best predicted value of y for x = 2.9?
Statistics and Probability, Statistics
Table 1. Fasting Blood FBS of Group A FBS of Group B 95 90 100 100 125 125 175 200 250 550 1. What is the mean fasting blood sugar value for each group? What is the median? Mode? Group A: mean:145, median: 125, mode: n ...
You have two investments that either make money or lose money. Each one has a 60 percent chance of making money, and a forty percent chance of losing money. There is a 30 percent chance that both investments make money. ...
Your supervisor comes to you and says she would like a marketing research study. She says there is a budget of $30,000. She would like to conduct a simple random sample of consumers interested in using the services of th ...
Calculate the standard deviation of a portfolio consisting of 40 percent stock X and 60 percent stock Y. Company Beta Expected Return Variance Covariance X 1.8 0.18 0.30 COVx,y=0.080 Y 2.6 0.22 0.04 Round to the nearest ...
If the coefficient of determination is 0.738, what percentage of the data about the regression line is unexplained?
A researcher determines that students study an average of 60 15 (M SD) minutes per week. Assuming these data are normally distributed, what is the z score for students studying 45 minutes per week?
According to national data, about 14% of American college students earn a graduate degree. Using this estimate, what is the probability that exactly 24 undergraduates in a random sample of 200 students will earn a colleg ...
Suppose a sampling space has things a, b, and c. Twice draw from the sample space and replace. The possible sequence formed are {aa,ab,ac,ba,bb,bc,cacb,cc}. Now suppose there are Y different things. There are Y ways the ...
Describe in detail each of four risk factors of holding a domestic bond. Your summary should convince the reader that you fully understand each risk factor.
Confidence intervals (CI) are one of the simpler forms of inferential statistics. What does the CI represent? And why does our knowledge of the Central Limit Theorem (CLT) and the empirical rule let us understand why the ...
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