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Rose records how long it takes him to drive to UCI every day for a month. During the same month, Mickey also records how long it takes her to drive to UCI. Rose averages 10 minutes, and Mickey averages 60 minutes. Would you expect A) Rose's standard deviation to be larger; B) Mickey's standard deviation to be larger; or C) their standard deviations to be about the same?
Identify each of the following variables are qualitative or quantitative
A manufacturer wants to increase the shelf life of a line of cake mixes. past records indicate that the average shelf life of the mix is 216 days. after a revised mix has been developed, a sample of nine boxes of cake mix gave these shelf lives (i..
Suppose that 98% of the customers in your market have Internet access, and you select a random sample of 500 customers. What is the probability that the sample has:
let Xn be number of people selected until first person with non-blue eyes shows up, and let X be number of people select until first person with different eye color to preceding people shows up. Find out E(Xb), E(Xn) and E(X).
Find the expected value if the cost of entering this sweepstakes is the cost of a postage stamp. Is it worth entering the contest?
What is the expected value and variance for the number of contacts in eight attempts?
Set up hypotheses and carry out all relevant tests. Describe all results and implications which you have discovered.
A common error is neglecting to get ranked data for some statistical processes. Why do we have to have ranked data? Give an example of where you would need ranked data.
The 47 students on a computer studies course each recorded the number of whole minutes, x, spent surfing the internet during a given day. Find the standard deviation SD = σx
1assume your federal income tax rate fitr is 28 and state income tax rate sjtr. is 8. calculate your after-tax cash
At the .01 significance level, can we conclude that there is more variation?
r. Patton is a professor of English. Recently she counted the number of misspelled words in a group of student essays. She noted the distribution of misspelled words per essay followed the normal distribution with a standard deviation of 2.44 word..
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