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A circus clown at the top of a 60-foot platform is playing catch with another clown on the ground. The clown on the platform drops a ball at the same time as the one on the ground tosses a ball upward at 80 ft/sec. For what length of time is the distance between the balls less than or equal to 10 feet? Hint: the initial velocity of a ball that is dropped is 0 ft/sec. The formula for the height S in feet above the earth at a time t seconds for an object projected into the air with an initial velocity of v ft/sec from an initial height of s0 is: S = -16t2 + vt + s0
Estimate the population in 1600 and graph the population trend from 1600 through to 2000
In a simple regression analysis, you notice that the R2 value is low (less than 0.4); however, the standard error is low. What does this tell you about the analysis?
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. If you determine not to reject the null hypothesi..
Explain why the ordinary least squares solution is not unique. What can you say about the residuals of any of the solutions. Using the SVD of X, write a closed form expression for this limiting solution.
How could the engineer increase the accuracy of the interval without changing the level of confidence?
A federal bank examiner is interest in estimating the mean outstanding defaulted loans balance of all defaulted loans over the last three years. Calculate a 90% confidence interval for the mean balance of defaulted loans over the past three years.
If an applicant is randomly selected, find the probability of a rating that is between 200 and 275.
At a 0.05 level of significance, does this data show that 2 year college students and private unversity students work an equivalent amount of time?
Smaller the p-value in test of hypothesis, the more important the results are.
What is an independent sample and what is a related sample? When should researchers use varying hypothesis tests for the different types of samples?
Engineers want to design seats in commercial aircraft so that they are wide enough to fit 98% of all males. (Accommodating 100% of males would require very wide seats that would be too expensive.)
In order for Samuel's average calorie intake to equal a daily average of 2200 calories, how many calories of food must he consume on Thursday?
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