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A random selection of accounting firms from three regions is taken and they are asked to state the starting salary for a new accounting graduate. Do a one-way ANOVA to analyze these data using a 1% level of significance:
South Northeast West--------- ----------- ---------
$30500 $41000 $35500
31500 39500 33500
30000 39000 35000
31000 38000 36500
31500 39500 36000
* Incorporate the 5-step hypothesis testing procedure
* If a significant F statistic is obtained, run a Post-Hoc Comparison's test on the 3 means
* Individual t-tests on all pairs of means can be done also
* Adjust level of significance to compensate for inflation
* Report which pairs of means are significantly different and their corresponding p values if available
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In a multiple regression equation two independent variables are considered, and the sample size is 25. The regression coefficients and the standard errors are as follows.
Explain a Type I error for this situation. Explain a Type II error for this situation.
Give a mathematical expression for the probability density function of driving distance.
What control limits should be applied to his sample?
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In a study of the consumer's view of the economy, the probability that a consumer would buy a house during the year was 0.0013, and the probability that the consumer would buy a car during the year was 0.198. There was also a 0.0100 probability t..
Write out the multiple regression equation using the given data.
a) Set up the null and alternative hypotheses, and perform the hypothesis test. b) Does the jury selection system appear to be fair?
There are 4 samples of 40 individuals each interviewed to find out how often they visit a fast food restaurant in the week.
Last week Sarah had exams in Math and in Spanish. On the Math exam, the mean was u, = 30 with a = 5, and Sarah had a score of X - 45. On the Spanish exam, the mean was u, = 60 with 0 = 6 and Sarah had a score of X = 65. For which class must Sarah ..
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