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What is the confidence level? A sample of 45 eggs yields a mean of 1.37 ounces. Assume that the standard deviation is 0.53 ounces what is the margin of error at the 95% confidence level.
The clinic estimates that the true population standard deviation is around $2,100. If the confidence level is 95%, find the required sample size in order to meet the desired accuracy.
Suppose that the number of cars, X, that pass through a car wash between 4:00pm and 5:00pm on any sunny Friday has the following probability distribution:
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level.
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of µ = 80 and a standard deviation of σ = 20. The researcher expects a 12 point treatment effect and plans to use a ..
A researcher wishes to construct a 95% confidence interval for a population mean. She selects a simple random sample of size n=20 from the population.
From past information, it is known that the standard deviation of the population is 22 mph. The 96.6% confidence interval for m is?
Evaluate the significance of the hypothesis that the randomized algorithm has a lower average runtime than the known comparison algorithm. As before, explain and list your calculations, test choices, and conclusion drawn.
Extra college-level training, and rest of the sailors arn't accounted for. How does your sample compare to what you expected to determine? Define null hypothesis.
Probability using Pareto chart - Evaluate the probability of randomly selecting an adult from the sample who doesn't always eat healthy foods because he or she has no time to cook or is confused about nutrition.
If 100 percent of a days production is inspected whenever the sample of 10 gives 2 or more defectives, then what is the pobability that 100 percent of a days production will be inspected?
Heather Carielli is a former student who earned a master degree at the Univeristy of Arkansas. When she randomly selected 16 new text books in the college book store she found that they had prices with a mean of $70.41 and a standard deviation of ..
Find the probability that exactly 15 flights arrive on time.
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