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Question: An economist wishes to estimate, to within 2 minutes, the mean time that employed persons spend commuting each day, with 95% confidence. On the assumption that the standard deviation of commuting times is 8 minutes, estimate the minimum size sample required. The response must be typed, single spaced, must be in times new roman font (size 12) and must follow the APA format.
An electronic circuit board fails randomly with failure rate of λ=0.00021 /h. When it fails it is replaced by a new board.
the prices of a gallon of milk at various stores in one town have a mean of 3.86 with a standard deviation of 0.13.
What IQ represents the 15th percentile?- What IQ represents the 98th percentile?- What's the IQR of the IQs?
Average salary of $27,839 with a standard deviation of $7,400. At the 0.01 significance level, do teachers with Master Degrees have higher salaries?
Identify the significance level, the test statistic, and the critical value, state whether you are rejecting or failing to reject the null hypothesis statement and explain how the results could be used by the manager of the company.
suppose the time it takes for a purchasing agent to complete an online ordering process is normally distributed with a
for a sample of 20 tires of a particular brand the average tread life was 65000 miles with a standard deviation of
Suppose you are given the probability distribution for a random variable X.
a random variable x has mean mu and standard deviation sigma. suppose n independent observations of x are taken and the
Explaining Variation in Bid/Ask Spreads Go to the currency converter at finance.yahoo.com/currency and determine the bid/ask spread for the euro.
When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?
Define the objective function for a firm and the decision variables Define the constraints for the problem (constraint for passengers and baggage)
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