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Suppose that customers at a telephone company receive busy signals 4% of the time. One week a customer calls 25 times. Whats the probability of one busy signal?
Some students see a steady price, while others see regular sales that temporarily cut the price. Students are asked the price they would expect to pay. This is an example of?
a sample of 200 elements from a population with a known standard deviation is selected. for an interval estimation of m
the probability that a region prone to hurricanes will be hit by a hurricane in any single year is 15 . what is the
What is an appropriate null hypothesis to compare the quality of the product manufactured in the overseas plants and the U.S. plants? Why?
During the gestation period of 28 weeks, what percent of the babies born within each gestation period have a low birth weight (under 5.5 lbs)?
the compressive strength of samples of cement can be modeled by a normal distribution with a mean of 6000 kilograms per
Suppose a social worker is involved in a study about family structure. She obtains information regarding the number of children per family in a certain community from the census data. What is the random variable of interest? Is the random variable..
Use mathematical induction to prove that : 1*2+2*3+3*4+....+n(n+1)(n+2)/3 for all n >_1 and (2) Find d=gcd (721 , 448), find integers s and t with d=721s + 448t, and put the fraction 448/721 in lowest terms.
a bank has just made 200 car loans. the banks records indicate that about 7 of their customers make late payments on
Is there sufficient evidence to support the claim that site has an effect on the amount of pesticide?
Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern. Describe and give examples of research questions in which internal validity is a primary concern.
What would you recommend to Mary Smith, and why - Mary Smith is the Manager of Market Intelligence for Acme Automotive Accessories (AAA) Corporation, a $500 million manufacturing company traded on the NYSE.
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