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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?
question a bag contains a total of 20 batteries of which six are defective. selecting two at random without replacement
The manager requires the estimate to be within 1.0 minutes of the population value. What sample size is needed?
The U.S. government collects data on energy consumption per capita for each state and the District of Columbia. The provided data file show the energy consumption per capita (in million Btu) for the year 2010.
Consider a random sample of six families who are asked if their children have an influence on their vacation destination.
specimens of blood from 10 different animals were analyzed for blood count say y in units of 100 and packed cell volume
Because the President officiates at this event , the secret service makes calculations which they use in planning security.
Different designs SRS from Normal data, Shape of the population distribution and sample distribution Margin of error doesn"t cover all errors How small a P is convincing?
If they must form an ethics subcommittee of 4 members, how many different subcommittees are possible?
Sugar in Cereal. Different cereals are randomly selected, and the sugar content (grams of sugar per gram of cereal) is obtained for each cereal
a local school district claims that the number of school days missed by its teachers due to illness is below the
in a survey of 1430 undergraduate students 1087 reported that they had one or more credit cards.a. provide a 90
In light of these data, are the percentages of divorcing couples with prenuptial agreements equal in these four places?
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