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Question: Suppose a population proportion is .40, and 80% of the time when you draw a random sample from this population you get a sample proportion of .35 or more. How large a sample were you taking?
Find the P value for the indicated hypothesis test with the given standardized test statistic, z. Decide whether to reject H0 for the given level of significance deviation. Two-tailed test with test statistic z= -2.43 and standard deviation = 0.04..
Assuming that a plane make a safe flight if at least one-half of its engines run, determine whether a 4-engine plane or 2-engine plane has the higher probability for a successful flight.
Both parties agree that if the average score in this year's survey is greater than one hundred and eight they will increase the police force. Is this decision rule adequate? What is the Type 1 error of this rule?
A certain component is critical to the operation of an electrical system and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of the components ..
Which distribution should be used to create 80% confidence interval?
A biologist considered studying the effects of various environmental pollutants on the health of mice by using a 27- 4 fractional factorial design.
as of october 2009 the united states federal dept was 11963668027500. if each of the 307000000 people in the united
a suppose that a newspaper in wisconsin wants to take a statewide survey concerning state budgetary issues. the
A standard deviation of 50. If an applicant is randomly selected, find the probability of a rating that is between 170 and 220. help solve statistics.
Kris Lee, the owner and manager of the Quality Hardware Store, is reassessing his inventory policy for hammers.
The pooled variance of two samples is:
The following frequency distribution reports the number of frequent flier miles, reported in thousands, for employees of Brumley Statistical Consulting, Inc. during the first quarter of 2004.
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