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The mean annual salary for flight attendants is about $65,700. A random sample of 48 flight attendants is selected from this population. What is the probability that the mean annual salary of the sample is less than $63,400? Assume σ = $14,500. (Adapted from Salary.com)
to study the birth weight of infants whose mothers smoke a physician records the weights of 100 newborns whose mothers
A uniform distribution has a minimum of six and a maximum of ten. A sample of 50 is taken. Find P(Sx > 420)
The coffee/soup machine at the local bus station is supposed to fill cups with 6 ounces of soup. Ten cups of soup are brought with results of a mean of 5.93 ounces and a standard deviation of 0.13 ounces. Construct a 99% confidence interval for th..
the fico credit rating scores obtained in a simple random sample are listed below. as writing the reported mean fico
Regression and Correlation are two of the most often used and abused tools in research. People are quick to jump to conclusions that if a relationship exists between two variables, then one must cause (causation) the other. There are many reasons ..
The standard deviation of the sample was 6.2 weeks. Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks?
This is a simple game, where you throw a dice which controls the position of your counter on a 3×3 board.
Create a 90% confidence interval for mean score on this placement exam for all students.
a man finds that two things cause him to wake up at night- his cat or his dog. if it is due to his cat the time to fall
1.one characteristic of billiard balls is their elasticity - the bounce they get when striking one another. a
A salesperson finds that, in the long run, two out of three sales calls are successful. Twelve sales calls are to be made; let X be the number of concluded sales. Is X a binomial random variable? Explain.
Assume that 2% invest in both kinds. If an investor is chosen at random, what is the probability that this investor has either public or corporate funds?
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