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Items produced by a manufacturing process are supposed to weigh 90 grams. The manufacturing process, however, is such that there is variability in the items produced and they do not all weigh exactly 90 grams. The distribution of weights can be approximately normal with mean 90 grams and a standard deviation of 1 gram. What percentage of items will either weigh less than 87 grams or more than 93 grams?
The percentage of physicians who are women is 27.2%. In a survey of physicians employed by a large university health system, 48 of 120 randomly selected physicians were women. Compute the test value.
questiona a municipal bond service in the us has three rating categories a b and c. suppose that of the total number of
a garage door opener has six toggle switches each with three settings up center and down. if a thief knows the type of
What would be your decision if a hypothesis test was conducted on this problem with the null hypothesis given as H0 : µ ≥ 2 and the alternate hypothesis given as H1
the weight of an organ in adult males has a bell shaped distribution with a mean of 310 grams and a standard deviation
When writing about the probability that it will rain in Boston on July 4 of next year, a newspaper reporter states that the probability is ½, because either it will rain or it will not.
Assume a random sample of 50 architects and engineers is selected. How likely is it that the random sample contain five or fewer women in these positions.
Your mayor just announced that the local unemployment rate dropped last month from the prior month. It went from 10.5% to 10.4%. Is this a significant drop? Explain.
The population of IQ scores forms a normal distribution with mean of μ = 100 and a standard deviation of σ = 15. What is the probability of obtaining a sample mean greater than M = 105,
Weight of the .5 cubic yard bag of landscape much is normally distributed with mean of 40 pounds and standard deviation of 1. Determine the probability that the bag will weigh more than 40 pounds?
Develop a forecast for year 6, using two-year moving average and trend analysis. Identify which method is most appropriate for this data set
Calculate the sample mean and sample standard deviation.
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