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40 numbers are rounded off to the nearest integer and then summed. If the individual round-off error are uniformly distributed over (-.5,.5) what is the probability that the resultant sum differs from the exact sum by more than 2?
The length of time recorded is normally distributed with a mean of 184 seconds and a standard deviation of 55 seconds. What is the probability that and individual will be able to keep eye contact longer than 239 seconds?
Effective on 80% of women and 65% of men. it is known that 66% of the people who take drug are women. That is the probability that the drug is effective?
A survey on the drinking habits of Americans estimated the percentage of adults across the country who drink beer, wine, or hard liquor at least occasionally. Of the 1516 adults interviewed, 985 said that they drank.
q1 bandura blanchard and ritter 1969 conducted an experiment that provided individuals with one of four treatments for
you are trying to estimate the number of csn students with iphones. a random sample of 130 students reveals that 65 of
Given that X1 is in the model, does X2 contribute to predicting the dependent variable at the .05 significance level?
Suppose that you're charged with comparing results of standardized tests from four different school districts. What statistical technique would you choose to use?
to use instruments in a shared research lab you first have to ask the lab monitor. she will then walk into the lab to
1. classify the following variable as nominal ordinal discrete or continuous and state why it is such a variable
Compute the expected value of perfect information. Do you think it would be worth trying to obtain additional information concerning which scenario is likely to occur?
A multiple choice quiz has 150 questions each with 5 choices and only 1 is the correct answer. What is the probability that sheer guess work yield from 30 to 40 correct answers out of the 150 questions?
The average cost of a gallon of regular unleaded fuel at gas stations nationwide was $3.23, with a standard deviation of $0.23. Assume the national average holds for Connecticut. What is the probability that a sample of 30 gas stations in Conne..
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