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a. A factory has five assembly lines. Each assembly line is down (not working) p percent of the time. What must p equal so that there is a 99 percent chance that at least one assembly line is working?
b. A rod meets its specifications if its diameter is between 0.96 and 1.04 inches. The mean diameter of a rod is 1 inch. What should the standard deviation of rods equal for 99 percent of rods to meet the specifications?
Question:1- Given that z is a standard Normal random variable, find following probabilities:
The sample mean and standard deviation are 20 days and 4 days, respectively. Using a confidence interval of 90%, construct the interval.
(a) What is the probability of observing an 83°F temperature or higher in LA during a randomly chosen day in June?
Many comforters contain both white feathers and down in order to provide a warm, soft cover. A bed-and-bath company would like to expand
An article in the Journal of Monetary Economics assesses the relationship between percentage growth in wealth over a decade and a half of savings for baby.
Pregnant? Suppose that 70% of the women who suspect they may be pregnant and purchase an in-home pregnancy test are actually pregnant.
the dividend yield on shareholders funds of australias top 120 companies for the week ended friday 10 july 2009 is
Calculate a 95% Confidence Interval for the following samples
I have two samples, one is 31.2% and one is 22.6%. I am trying to calculate the 95% confidence interval in context of this situation. ALso i need the formula that is used to calculate the interval and substitute appropiate numerical values into the f..
Transmission is normally distributed with an average of 78,000 miles and a standard deviation of 15,000 miles. What percentage of these transmissions will last at least 90,000 miles?
Provide an example from your work or home life; illustrate the difference between the application of descriptive statistics and inferential statistics.
Nutrition trends have changed over the years, and this may affect growth. Researchers want to know whether the mean height of 25-year-old women is the same.
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