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A properly designed poll of 400 randomly-selected voters found that 40% are in favor of a ban on tattoo parlors. Given the size of the sample, which of these ranges best describes how much of the entire voting population agrees with the tattoo parlor ban?
What is a probability density function and how is it relevant to the determination of probabilities associated with a continuous random variable?
Department members are expected to vote independently and with no prior consultation. What are the candidate's chances of getting the position?
Conduct a hypothesis test of to see whether the 2001 sample data indicate that the variability in interest rates has changed. Use . What is your conclusion?
use Microsoft excel, as your graphing calculator, or the binomial probability formula to calculate the probibilities of the following events. Event A: The probability that you will have to oay out exactly $20.
During the last year sales averaged $22,000 per month. Does this indicate that monthly sales have changed (in a statistically significant sense)? Use 0.05. Assume monthly sales are normally distributed.
Suppose that in a lottery you choose 5 numbers out of 47. Five numbers are then drawn and you win a prize if you have at least 3 of the 5 numbers. What is the probability that you win something?
the professor plots a histogram of these several proportions. Should a Normal model be used to represent the sampling distribution of the proportion of tails?
Compute a 95% confidence interval for the proportion of all residents of the town who would use the auditorium.
The Ice Chalet offers dozens of different beginning iceskating classes. All of the class names are put into a bucket.
If you draw one ball from the urn what is the probability that it is blue or white?
To find this, we must realize that we must use the sampling distribution of the mean to carry out the appropriate calculations. The sampling distribution of the mean will have a mean of $36, but a standard error of $8/√16 = $2
Consider each of these situations. Do you think the proposed sampling method is appropriate? Explain.- We want to know if there is neighborhood support to turn a vacant lot into a playground.
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