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1.) If you buy a box of Wisk, the probability of getting a scoop is 97%. If you buy 9 boxes over the next several months, what is the probability of missing two scoops?
2.) The average length of a cellular phone call in the US is 3.4 minutes. If the standard deviation of those calls is .07 minutes (population standard deviation), what is a 99% confidence interval? We calculated the mean from 86 cellular calls.
3.) A customer service agent gets a call every 6 minutes. What is the probability that the agent will get less than 8 calls during the third hour she works?
Assume the arrival of these emails i3 approximated by the Poisson distribution.
Estimate the probability the store will gross over $850 a) Fewer than 5 out of 10 business days.
Let p represent the population proportion of all numbers in the corporate file that have a first nonzero digit of 1. Test the claim that p is less than 0.301 by using What is the P-value of the test statistic?
What is the best first glance prediction you can give the customer about the value of his house given your 2 variable linear regression analysis?
In each month, the proportion of "Prize" bonds that win a prize is 1 in 11000. There is a large number of prizes and all bonds are equally likely to win each prize.
Thirty-five fourth-grade students were asked the traditional question "what do you want to be when you grow up? The responses are summarized in the following table:
The manufacturer would like to establish Inventory levels such that there is only a 5% chance of running out of stock. Where the Manufacturer should set the inventory levels?
A pie chart shows the market shares of cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What is its market share?
Determine the mean and variance for the number of Version 3 that someone would expect to get if they were to purchase 18 of the board games at random.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
Compare these with the percentages specified by Tchebysheff's Theorem.
Use the continuity correction and describe the region of normal curve that corresponds to the indicated binomial probability. The probability of more than 50 right answers.
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