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We have calculated a confidence interval based on a sample of size n=100. Now we want to get a better estimate with a margin of error that is only one fourth as large. How large does our sample need to be?
WHy is the answer 1600? Can someone explain the process please.
A study was recently done in which 500 people were asked to point out their choices for one of three products. Following table illustrates the breakdown of responses by gender of the respondents.
the cholesterol found in eggs is normally distributed with a mean of 200 mg. and a standard deviation of 8 mg. if a
Suppose that a sample of size 44 is drawn from a population with mean 88 and standard deviation 36 find the value of sigma, the standard deviation.
Random sample of five North American adult is more than 7 hours a day? What is the probability that in random sample of 5 north American adults, all watch television more than 7 hours a day?
Make a list of the different types of legislation that apply to the business that can affect customer service
To see if eating just before going to bed causes nightmares, volunteers are recruited to spend the night in a sleep laboratory.
The utilities data set contains information from utilities bills for a personal residence over a number of years. One would expect that the gas bill
Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
consider a carton of twelve eggs of which three are rotten. suppose we randomly select five eggs. compute the
A rare nonlethal disease (ND) that develops during adolescence is believed to be associated with a certain recessive genotype (aa) at a certain locus.
What is the arithmetic mean of the Alaska unemployment rates? Find the median and the mode for the unemployment rates.
Draw four red cards in a row without replacement. Draw a five card hand containing exactly 3 red and 2 black cards.
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