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A popular online retailer uses data-mining techniques to "up-sell" to customers who make purchases on its site. When a customer makes a purchase, the site suggests additional items for the customer's consideration. In a random sample of 200 customers, it was observed that 11 took the suggestions to heart and made additional purchases. A 90% confidence interval for the proportion of customers who make additional purchases would have lower and upper limits of, respectively, __________ and __________.
approximately 8.33 of men are colorblind. you survey 8 men from the population of large city and count the number who
The test question was if this difference between the test statistics and the stated life of the battery was significant? The .05 significant level was selected for the test. Which is the correct statement?
the number of traffic accidents in a city during one hour follows a poisson distribution with mean 3 accidents per
What units represent the margin of error? Suppose you want to decrease the margin of error, but want to keep the 95% confidence interval. What do you need to do?
the following sales data are available for 2003-2008.year demand2003 72004 122005 142006 202007 162008 25determine a
The manager of an express oil change service has determined that the number of customer who arrive in a one hour time interval (x) can be modeled using a Poisson model with mean =2.5 customer per. What is the standard deviation of the number of cu..
The records of a casualty insurance company show that, in the past, its clients have had a mean of 1.8 auto accidents per day with a variance of 0.0016.
If the inner surface is coated with carbon black and maintained at 600 K, what is the irradiation on a small test surface placed in the chamber? If the inner surface were not coated, but still maintained at 600 K, what would the irradiation be?
What proportion of the adult men in United States are more than feet tall? (Hint: feet inches.) Round your answer to at least four decimal places.
Discuss something you have witnessed or observed in nature. Discuss the temptation to imply or infer causality and be sure to identify areas of future investigation that might be warranted to determine cause and effect.
in a recent survey 45 indicated chocolate was their favorite flavor of ice cream. suppose we select a sample of
Choose a variable and collect data for a least three different groups(samples). Compare the means of the three groups using the one-way ANOVA technique. Complete the following:
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