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The average hourly wage of workers at a fast food restaurant is $6.50/hr with a standard deviation of $0.45. Assume that the distribution is normally distributed. If a worker at this fast food restaurant is seleceted at random, what is the probability that the worker earns more than $6.00?
A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the school's students, 32% of them plan to go into general practice. Find the P-value for a test of the s..
You sample a group of computers and use the sample statistics to calculate a 95% confidence interval of (-10.95, -1.5). This interval estimates the difference of (average boot time (HDD) - average boot time (SSD)). What can we conclude from this i..
What is the probability that the second one selected is defective given that the first one was defective? What is the probability that both are defective?
The probability of getting a big order currently under negotiation is 0.4. The probability of losing money this quarter is 0.5.
rolling dice 25 times gives the below results. using your results find the relative frequency for each of the values 2
In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested as a treatment for upper respiratory infections in children.
one-year returns of 223 mutual funds are grouped below.one-year returns of mutual fundsclass return in
What is the risk of smoking for Female students?
Test hypothesis that two processes have identical fractions nonconforming. Use a = 0.05. Create the 90% confidence interval on difference in fraction nonconforming between two processes.
Listed below are the highway fuel consumption amounts (in mi/gal) from cars in three different categories. Use a 0.05 signifiacance level to test the claim that the different car categories have the same median highway fuel consumption.
Do the confidence interval limits contain 98.6F? What does the sample suggest about the use of 98.6F as the mean body temp.
100 trials are run for a poisson process. if the probability of a success is 0.02 what are the mean number of successes
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