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A group of investors wants to develop a chain of fast-food restaurants. In determining potential costs for each facility, they must consider, among other expenses, the average monthly electric bill. They decide to sample some fast-food restaurants currently operating to estimate the monthly cost of electricity. They want to be 99% confident of their results and want the error of the interval estimate to be no more than $100. They estimate that such bills range from $600 to $2,500. How large of a sample should they take?
If 1.5 million X-Games were sold over the holidays, determine an interval for the number of defectives in sales. 12,184 to 32,816.
Use Chebyshev's theorem to find what percent of the values will fall between 120 and 150 for a data set with mean of 135 and standard deviation of 7.5
The best estimator or appreciative of the population proportion is 0.45. How large must the sample be?
The average income of 11 families who reside in a rural area of the Midwest is $60,213, with a standard deviation of $2009. At α =0.05, can it be concluded that the families who live in the cities have a higher income than those who live in the ru..
Determining sample-size is important step when planning a statistical study. It is also quite a difficult task since many variables must be considered.
the wind mountain archaeological site is located in soutwestern new mexico. wind mountain was home to a culture of
A research study will measure the cost of the new method over a sample production period. Develop the null and alternative hypothesis most appropriate for this study.
In a random sample 1040 consumers, you find 35% have stopped buying the product. At alpha=0.04, do you have enough evidence to support the claim?
According to Chebyshev's Theorem, how many students scored between 57 and 93? Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 57 and 93?
Determine the percentage of samples of size 16 that will have mean amounts of coffee within 0.1 ounce of the population mean of 8.2 ounces.
how many commuters must be randompy selected to estimate the mean of driving time of chicago commuters? we want 98
q1. an fbo a fixed-base-operator usually the manager of a small-town airport makes his revenue in three ways flight
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