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1. Roger Amster teaches an English course in which 40 students are enrolled. After yesterday's class, Roger questioned the 5 students who always sit in the back of the classroom. Three of the 5 said "yes" when asked if they would like A Tale of Two Cities as the next class reading assignment.
a. Identify the population and the sample in this situation.
b. Is this likely to be a representative sample? If not, why not?
2. In studying the performance of the company's stock investments over the past year, the research manager of a mutual fund company finds that only 43% of the stocks returned more than the rate that had been expected at the beginning of the year.
a. Could this information be viewed as representing the nominal scale of measurement? If so, explain your reasoning. If not, why not?
b. Could this information be viewed as representing the ratio scale of measurement? If so, explain your rea- soning. If not, why not?
Which is more likely to occur-more than 60% correct identifications in the sample of 200 or more than 55% correct identifications in a sample of 1,000? Explain.
The medical school at a university, if 10 medical students are randomly selected for that school. find the probability that only 4 of them will graduate.
it is estimated that 56 of the children between the ages of 3 and 5 years are already enrolled in school. in a sample
q1 a doctor wants to know if there is a relationship between a fathers weight and his first newborn sons weight.
the heights of people of the same sex and similar ages follow a normal distribution reasonably closely. weights on the
a simple random sample of 100 postal employees is used to test if the average time postal employees have worked for the
Let X1, ... , Xn depict a random sample drawn from the probability density function f (x; θ) = θxθ -1,0 x 1, θ > 0. Find the minimum variance bound for an unbiased estimator of θ .
You are reading an article detailing a study designed to compare the average body mass index among hypertensive individuals (persons with high blood pressure) to normotensive individuals. The study was conducted using participants in a health pla..
post your response to the following questions and participate in the discussion with your fellow students during the
Marketing firm asked the random set of married and single men as to how much they were eager to spend for vacation. At alpha= .05, is a difference in two amounts?
question suppose that the medium coffees sold by a certain coffee shop have a mean volume of 16 ounces and a standard
the sample space of equally likely outcomes for the experiment of rolling two fair dice is
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