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When researchers set their alpha level at .05, they reject the null hypothesis (and conclude that the independent variable has an effect) only if there is less than a 5% chance that the differences among the means are due to error variance.
Does this mean that 5% of all results reported in the research literature are, in fact, Type I errors rather than real effects of the independent variables?
if the null hypothesis that two means are equal is true where will 99 of the computed z-values lie between?a.
(Termination Tolerance for Transportation Problems) Consider a transportation problem with m sources and n sinks, and integer data. Show that in order for a feasible x to be optimal it is sufficient that it satisfies -CS together with some p and ..
How did China influence the world of the third-wave era? How was China itself transformed by its encounters with a wider world?
a study is made of residents in phoenix and its suburbs concerning the proportion of residents who subscribe to
What is the calculated chi-square statistic and What are the degrees of freedom - Write a short description of your results, including the level of statistical and substantive significance, the direction of the association, and whether any low expe..
A random sample of 100 doctors results in 83 who indicate that they recommend brand A. The value of the test statistic z in this problem is approximately?
commercial fishermen in alaska go into the bering sea to catch all they can of a particular species salmon herring etc.
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
Test the claim of the brewery about the mean volume equal to 32 oz. at the 0.05 significance level. It's your choice whether to use z or t.
find the area of the shaded region. the graph depcits iq scores of adults and those scores are normally distributed
a friend of mine is giving a dinner party. his current wine supply includes 9 bottles of zinfandel 10 of merlot and 11
Compute a chi-square test for goodness of fit for each of the following, using the .05 level for each. In each problem, the expected distribution is equal frequencies in each category.
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