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Consider the accompanying 2 x 3 table displaying the sample proportions that fell in the various combinations of categories (e.g., 13% of those in the sample were in the first category of both factors
a. Suppose the sample consisted of n = 100 people. Use the chi-squared test for independence with significance level .10
b. Repeat part (a), assuming that the sample size was n = 1000.
c. What is the smallest sample size n for which these observed proportions would result in rejection of the independence hypothesis?
a paper studied various aspects of bus service and presented data on travel times from several different routes. the
the following sales data are available for 2003-2008.year demand2003 72004 122005 142006 202007 162008 25determine a
What is the probability of Picking a second red ball from the urn in Prob. 3.4 when a red ball was already obtained on the ?rst pick and not replaced?
Graph one trace of the sample mean of a Poisson (α = 1)random variable. Calculate (using a central limit theorem approximation) and graph the corresponding 0.9 confidence interval estimate.
suppose x y and c represent the length width and perimeter of a flat rectangular sheet metal part. note that x is a
you are an engineer in charge of aircraft safety. you want to ensure that the probability of failure between
This problem related to Basic Statistics and it discuss about standard deviation of a program being run for 0 seconds
Compute the first quartile the third quartile and the interquartile range.List the five-number summary.Construct a boxplot and describe its shape.
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
Other research examining the effects of preschool childcare has found that children who spent time in day care, especially high quality daycare, perform better on math and language tests than children who stay at home with their mothers
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
a company employers 800 men under the age 55. suppose that 30 carry a marker of the male chromosome that indicates an
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