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The 2011 gross sales of all firms in a large city have a mean of $2.3 million and a standard deviation of $0.6 million Using the Chebysev's theorem, find at least what percentage of firms in this city had 2011 gross sales of $1.1 to $3.5 million.
If x is a binomial random variable where n = 100 and p = .1, find the possibility that x is less than or equal to 10 using the normal approximation to the binomial.
To determine whether there exists mean difference among the groups:
(a) What is the probability of extinction? (b) Find the probability that the population is extinct in the second generation.
the data below are yields for two different types of corn seed that were used on adjacent plots of land. assume that
1. Determine the margin of error for a confidence interval estimate for the population mean of a normal distribution given the following information:
A demonstration to verify that an item meets its reliability requirement is based on obtaining 5 successful tests. If the probability of a successful test is 0.9, find the probability that 10 tests will be required to pass the demonstration.
What is the test value for this hypothesis test? Test value: Round your answer to three decimal places. What is the critical value? Critical value: Round your answer to three decimal places.
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
Is there a difference between the two sample proportions? (Conduct a two sample proportion test with significance level 0.05). Is there an association between being harassed online and in person? (significant level 0.05)
At least half the patients are under 15 years old? First, explain how this can be modeled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20%.
if a sound is 100 times louder than a whisper how loud is that sound in
A Poisson distribution was fitted to data for the number of cars crossing a bridge in forty successive 6-minute intervals of time. The sample mean was calculated from the data to be ??¯ = 2.875 and this value was used as an estimate of the populat..
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