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A bowl with 10 marbles: 2 red marbles, 3 green marbles, and 5 blue marbles. We randomly select 4 marbles from the bowl, WITH REPLACEMENT, that is once a marble is selected, its color is noted and the marble is put back in the bowl (notice thisdoes NOT resemble the hypergeometric distribution as that is without replacement).
a) What is the probability of selecting 2 green marbles and 2 blue marbles?
b) What is the expected number of green marbles?
c) What is the covariance between Y1=the number of green marbles and Y2= the number of blue marbles?
Assess the model fit for the multiple linear regression model using appropriate statistics and graphics.
Labor negotiations estimate that 30 percent of all major contract negotiations result in a strike. During the next year, 12 major contracts must be negotiated. Determine the following probabilities.
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
Looking at the data, the manufacturer is incorrect in its label claim. Perform hypothesis testing to prove or disprove it. Is the manufacturer correct in its label claim? Explain.
Determine the probability that between 5 and 10 minutes will pass between successive occurrences.
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
Use simple exponential smoothing with α = 0.3 to forecast battery sales for February through May. Assume that the forecast for January was for 22 batteries.
Use suitable one or two sided test for null hypothesis of no difference in them then changes rating between groups at 0.10 significance level.
Based on the equation of the least-squares line, we use software to predict the average number of home runs hit per game per team for the year 2001. We obtain the following.
Is there evidence that teams with higher total payrolls tend to be more successful? Justify your answer.
What is the probability that the mean starting salary is between $31,000 and $33,000 - Graduates from a graphic arts course at a community college have a mean starting salary
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