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1. Travelers are asked how many hours they are willing to drive while on vacation in one day. A total of 86 travelers reported a mean of 11.55 hours with a standard deviation of 1.2 hours. Find the 99% confidence interval for the mean number of hours travelers are willing to drive.
What is your value for E?
What is your confidence interval?
2. 18% of the students at Brockport College live in within five miles of the campus. You take a sample of 84 students. What is the 85% confidence interval for the population proportion of students who live within five miles of the campus?
3. A soccer ball manufacturer wants to estimate the mean circumferance of mini-soccer balls withing 0.15 inch. Determine the minimum sample size needed to construct a 99% confidence interval for the population mean. Assume that the population standard deviation is 0.20 inch.
If Procter & gamble sells about 20 million bars of soap per week, but the demand is not constant, and production management would like to get a better handle on how sales are distributed over the year. What might be helpful to the production and (..
Perform exploratory analysis and create at least three classification models for predicting hospitalization based on Year 1 data.
a random sample of forty-three 200 meter swims has a mean time of 3.27 minutes and a standard deviation of 0.07
the following data were obtained from a survey of college students. the variable x represents the number of
a national manufacturer of unattached garages discovered that the distribution of the lengths of time it takes two
suppose that customers at a telephone company receive busy signals 4 of the time. one week a customer calls 25 times.
Define T , the "ordinal triangle," by T := {(x , y) ∈ X × X : y x }. Evaluate the iterated integrals (( 1T (x, y) dµ(y) dµ(x ) and (( 1T (x, y) dµ(x ) dµ(y). How are the results consistent with the product measure theorems?
This system will have no steady-state error for a step input, (a) Plot the frequency response, noting the two peaks in the magnitude response (b) Predict the time response to a step input, noting that the system has four poles and cannot be repres..
What are significant predictors of CHD and what would a final model look like and can you provide an estimate of its predictive accuracy
1. Let a random sample of size 17 from a normal population for which both mean μ and variance σ2 are unknown yield x = 3.12 and s2 = 1.04. Determine a 99% con?dence interval for μ.
Portfolio B's yearly return is normally distributed with a mean of 0.04 and a standard deviation of 0.06. Based on this information, what is the probability that over the next year, the return on portfolio A is lower than the return on portfolio B?
q1. samples of size n 5 are collected from a process every half hour. after 50 samples have been collected we
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