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For each of the following, if the scenario fits the conditions for the approximate normality of the sampling distribution for a sample proportion, describe the sampling distribution of P^ and draw a picture of it. If the scenario doesn't fit, explain why not (in which case you do not have the tools to describe the sampling distribution of P^).
a. An auto insurance company has 1500 customers in a city, and over the long run, 6% of them will file a claim in any given year. Define P^ to be the proportion who file a claim in the next year.
b. A dean has found that over the years, about 15% of students who begin their college work in her program do not finish. This year, 90 students will begin her program; define P^ to be the proportion who will finish.
c. An essay contest has three winners, but the number of entrants varies each time that it is offered, so the proportion of entrants who are winners also varies. Define P^ to be the proportion of entrants who will be winners the next time that the contest is offered.
what is the first big change that american drivers made due to higher gas prices? according to a survey 30 said that it
Find approximate 95% confidence intervals for the proportion and the percentage of adult Americans who would say they favor this experimentation.
iq is normally distributed with a mean of 100 and a standard deviation of 15. suppose one individual is randomly
The researcher then records the level of activity for each child during a 30 minute session on the playground. Is this an experimental or a correlation study? Explain your answer.
a survey was done and found that the best chocolate is dark chocolate. 29 of clients prefer dark chocolate.nbspnbsp
an index of two store items for 2007 based on 2004 is to be constructed. the information for the prices and quantities
The personnel director of a large firm has summarized a random sample of last year's absentee reports in the accompanying contingency table. At the 0.01 level of significance, test the independence of age versus length of absence.
The data set cars from Ezekiel (1930) contains stopping distances for various speeds. Smooth the data using Friedman's smoother by choosing your own value of the span. Use dist as the dependent (response) variable and speed as the independent (pre..
Short Essay:(Value: 25 % of course grade)This assignment may be based on one of the major issues or debates addressed in the module discussions and short writing assignments (allowing the student to extend their analysis of a particular issue).
four mutually exclusive events a b c and d have probabilities of 0.1 0.2 0.3 and 0.4 respectively. what are the
How many levels of task difficulty were studied?- How many levels of effort were studied?- Are there any significant task difficulty main effects?
Let F be a field and p(x) and irreducible polynomial over F. Prove that (p(x)) is a prime ideal of F[x]. If R has no divisors of zero, then neither does R[x].
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