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Pick any two variables that you feel may be related and estimate what you think the strength of the correlation coefficient would be for those two variables. In your response, estimate the value of r. For example, specify a strong (.7 to .9), medium (.4 to .6), or low (0 to .3) value for r. The value of the coefficient can be positive or negative. For example, consider an increase in police patrols in a neighborhood and the number of burglaries that occur in that neighborhood. I would say that would be a strong inverse relationship with an r value of -0.8; as one (patrols) increases, the other (burglary rate) goes down. Describe the factors that you think would contribute to why the variables would have the relationship that you estimate it to be.
Create trend-moving averages with the following values form: 10, 100, and 200. Graph the data with Excel.
to assess the opinion of students at the ohio state university about campus safety a reporter for the student
What conclusions can you reach about the relationship between the battery capacity and the digital-mode talk time? You would expect the cell phones with higher battery capacity to have a higher talk time. Is this borne out by the data?
What is the probability that tomorrow's return on your investment in ABC is somewhere between -1% and +.5%?
What is the maximum likelihood estimate of μ? What is an approximate standard error of the maximum likelihood estimate?
a. Explain a method of randomizing the experimental units to the levels of factors A and B in this experiment. b. Write a linear model for this experiment. Make sure to identify each of the terms in the model and list the range of values for all su..
Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows.
Yyielding a $20,000 profit, and a 30% chance that the building will sell for $230,000, yielding a $70,000 profit. What is the expected profit? = E( X - ) = ( xi - What is Var(X)?
Political polls typically sample randomly from the U.S population to investigate the percentage of voters who favor some candidate or issue. The number of people polled is usually on the order of 1000.
How many ways can this happen if one person will win a new pencil, another will win a trip to McDonalds, another will win a weekend in Chicago, and the final prize is an automatic 4.0 in Math class.
According to an exit poll taken by CNN during the 2008 Democratic Primary in Connecticut, 552 registered voters voted for Hilary Clinton and 598 for Barack Obama. Would you have been willing to predict Obama as the winner?
How many more observations are necessary for the efficiency expert to be 95% sure that the point estimate x¯ will be in error from the true mean p by at most 15 seconds and find a 75% confidence interval for the population mean number of cars per su..
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