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Find the value of the liner correlation coefficient r, and then find the regression equation of the following table. A company manager wishes to test a union leader's claim that absences occur on the different week days with the same frequencies. Test this claim at a = 0.05, where the following data have been compiled Day Sun Mon Tue Wed Thru Absents 37 15 12 23 43 3) Evaluate the F test statistic for the following data, where for each sample
Group 1 Group 2 Group 3 Group 4 Sample Mean 6.6 3.4 3.0 1.2 Sample Variance 5.35 1.35 2.5 2.65
Mmean of 67 inches and a population standard deviation of 4 inches. For any one person selected at random, what is the probability that their height will be: more than 69 inches?
Assume that a simple random sample is selected from a normally distributed population, use eith the P-value method or the tradiitonal method of testing hypotheses.
if x nusigma 2 find the value of c such that p x- u lt c
which of the following are assumptions of the analysis of variance f test for comparing population means of several
Compute the value of t. What is your decision regarding the null hypothesis? Briefly summarize your results.
two different sprays for rewaterproofing parkas are compared by treating 5 parkas with spray 1 and 6 with spray 2.
two samples of size 25 each yielding x-bar 6.47 sx 1.14 y-bar 6.17 and sy 1.166 show a significant difference
The average on an exam is 75 and the standard deviation is 17. If the instructor assigned grades based on the Normal distribution what percentage of students will make A's and what percentage will make B;s in teh exam. Assume standard cut-off for ..
A sample of n=20 has a mean of M=40. If the standard deviation is s=5, would a score of x=55 be considered an extreme value?
A random sample of 64 light bulbs indicates a sample mean life of 350 hours. At the 0.05 level of significance, is there evidence that the mean life is different from 375 hours?
sixty-four measurements are made on the speed of light. these average out to 300.007 and the sd is 10 the units being
A sample is taken prior to a major election of likely voters. The null hypothesis is that the votes will be split 50/50. One candidate gets 54% of the support in the sample and the p-value for this sample is calculated to be 0.12.
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