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Question: What is the required sample size for determining the proportion of defective items in a production process if the proportion is to be known to within 0.05 with 90% confidence? No guess as to the value of the population proportion is available.
In a poll of 553 voters in a certain city, 64% said the back a bill which would limit growth and development in their city. The margin of error in the poll was reported as 4 percentage points.
The average monthly gasoline purchase for a family with 2 cars is 90 gallons. Find the probability that the family's monthly gasoline purchases will be between 86 and 96 gallons.
starting on day 1 you buy one lottery ticket each day. each ticket is a winner with probability 0.1. find the pmf of k
Equal opportunity? A company issued for job discrimination because only 19% of the newly hired candidates were minorities when 27% of all applicants.
Translate the following arguments into symbolic form.- If either medical fees or malpractice awards escape restrictions, then health care costs will soar and millions of poor will go uninsured.
2 cards drawn from a 52 but before the second card is drawn you put the first one back and reshuffle the deck. Are the outcomes on the two cards independent and why?
In the spring of 2002, residents of the United States were quite worried about the possibility of further terrorists attacks. To gauge the public's sentiment on this topic, the Gallup Poll asked 1002 U.S.
Once you have all the data find the percentage of your participants who preferred Pepsi and the percentage whom preferred Pepsi. To do this, simply divide the number of those who preferred Pepsi by 30 (your sample size) multiply by 100 and round y..
Calculate the confidence intervals about a regression line. My data is log transformed and has high R-square value for what is called "power" equation in Excel. My CI's are narrow at the top of the graph and very wide near the bottom.
Suppose we generate a random variable X in the following way. First we ?ip a fair coin. If the coin is heads, take X to have a Unif(0,1) distribution. If the coin is tails, take X to have a Unif(3,4) distribution.
Discuss whether you think the Fundamental Rule for Using Data for Inference would allow Maria to draw conclusions about the population proportion based on the sample proportion.
Using a simulation of 25 random numbers. Find average profits for order quantities of interest. Investigate in intervals of 500.
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