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A random variable Y has unknown mean µ and standard deviation 20. What is the sample size n needed so that the 99% margin of sampling error is 5?
Which is the estimated or dear proportion of defective cups in the population?
a) Determine the proportion of instances that the duration was less than 240 seconds. Also express the proportion as a percent. (hint: proportion is number of successes divided by total number.)
In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 13 patients using the drug is selected. Find the probability that: exactly three will have this mild side effect.
The 90 percent confidence interval for the population mean is to (Round your answers to 3 decimal places.) Would it be reasonable to conclude that the population mean is 22 eggs? What about 24 eggs?
If an original set of measurements is made in inches and has mean of 36 and variance of 144, what will be the mean, variance, and standard deviation if:
a helical tension spring is made of 1.2 mm wire having a yield strengths of 1280 mpa tension and 740 mpa torsion. the
measuring disease frequency in 2000 the crude mortality rate from all causes for haiti a very impoverished country was
A simple random sample of 36 bulbs yields a mean lifetime of 504 hours. Construct and interpret a 99% confidence interval for the mean lifetime of all such bulbs.
using the data provided x the quality of the speed of execution and y overall satisfaction with the electronic trades
1.females in a certain class rated their intelligence with a mean of 6.5. the males in the same class rated their
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate µ and σ in the formula for the normal approximation to the binomial, and show the final formula you would use without g..
You have been put in charge of developing a new game of chance. In this game a person will roll two cubes each having the numbers 1 to 6 on their faces. As a first step in developing the game, what are the possible outcomes and their probabilities?
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