Estimate the true proportion of home
A report states that 38% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 4% with 95% confidence?
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At a 1% level of significance, does your test show enough evidence to conclude that a significantly lower percentage of accounting firms offer employees flexible scheduling? What is the p-value for this test?
What is the probability that the mean of a random sample will be equal to or greater than the 97.5 percentile of its corresponding sampling distribution?
The researcher wants to know if there is sufficient evidence to conclude that the proportion of adults who support the death penalty is higher in the U.S.A. than in Germany. What is the decision at a = .05 and 0.10?
The table below shows the price of a volatile stock from the months January 1999 through December 1999 as determined by the closing price on the last trading day of the month. The price is rounded to the nearest dollar. make a line chart that best
Assume that three industrial processes (A,B and C) are independent. If the probability of successfully working for 8 hours is 0.99 for process A, 0.95 for process B and 0.80 for process C, then
Suppose that the weights of cinder blocks at a local construction yard follow a normal distribution with mean of 20 kg and a variance of 0.25 kg2.
If alpha=0.05 and p= 0.07 ,would we reject or fail to reject null hypothesis? Please explain.
Suppose that the life span of a certain type of fan has an exponential distribution with a mean life span of 25000 hours. Find the probability thaat a randomly selected fan will last
An insurance policy is written to cover a loss, X, where X has a uniform distribution on [0, 1000]. At what level must a deductible be set in order for the expected payment to be 25% of what it would be with no deductible?
Find the probability that a customer uses both high-speed internet and a digital phone. Write a probability statement and round to three decimals. Find the odds against the event in part A.
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