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Question: Teaching and research. A college newspaper interviews a psychologist about student ratings of the teaching of faculty members. The psychologist says, "The evidence indicates that the correlation between the research productivity and teaching rating of faculty members is close to zero." The paper reports this as "Professor McDaniel said that good researchers tend to be poor teachers, and vice versa." Explain why the paper's report is wrong. Write a statement in plain language (don't use the word "correlation") to explain the psychologist's meaning.
Dancing and singing. Refer to the previous exercise. Draw a Venn diagram, similar to given Figure, showing the probabilities for dancing and singing.
The media often attempts to predict the outcome of national elections. Why are they often wrong? Based on the concepts presented in this module's readings, how could the system be improved?
1. Let Yi and Yn be, respectively, the first and nth order statistics of a random sample of size n from a distribution of the continuous type having distribution function }{x). Find the smallest value of n such that Pr [}{Yn) - F(..
The appliance giant offers a replacement guarantee on kettles which malfunction within a certain time of the purchase, but due to financial constraints, can only afford a maximum of 5% replacements. What must the guarantee period be?
Assuming that the standard deviation and the normal shape are unchanged, to what level must the mean reduce so that 20 gallons per week is the third quartile rather than the mean?
What is the cost structure of the air industry? How does it compare with other modes? How does this affect pricing, particularly for passengers? Be sure your answer includes examples from either advertising or the
question the police chief in montgomery wants to know if the citys population feels that the police are doing a good
let x1 and x2 be two independent random variables each representing the number of heads in two flips of a fair coin.
Give degrees of freedom for statistic and the entries from Table E that correspond to this distribution.- Sketch a picture of this F distribution with the information from the table included.
The joint cumulative distribution function for (X, Y) is given by F(x, y) = ( 1 - e-x/ID - e-y/l + e-lx+SyJ/I0)/10,001 (x)I10,oodY).
suppose an airline decides to conduct a survey of its customers to determine their opinion of a proposed one-bag limit.
a university found that 30 of its students withdraw without completing the introductory statistics course. assume
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