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A tire manufacturer wants to determine the inner diameter of a certain grade of tire. Ideally, the diameter would be 570 mm. The data are as follows:
572, 572, 573, 568, 569, 575, 565, 570.
(a) Find the sample mean and median.
(b) Find the sample variance, standard deviation, and range.
(c) Using the calculated statistics in parts (a) and (b), can you comment on the quality of the tires?
Find the expected frequency for each cell and compute X stat square? Is it significant at alpha-0.05?
Using the 0.05 level of significance, is there evidence that the population mean is above $300? What is your answer in (a) if s = $90 and the 0.10 level of significance is used?
Mike works in a quality at a well known saw blade company. An inpsector on his team has uncovered an issue with the kerf dimension on the bandsaw blade line.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
the following factors were studied to see their effect on light intensity yabcdefgnbspmolaritysolute typephgas
Find out and interpret coefficients of correlation and determination for U. S. prices versus Canadian prices.
Take pM and pF to be the proportions of all college males and females who worked last summer. We conjectured before seeing the data that men are more likely to work. The hypotheses to be tested are?
To set up a decision rule, the sampling distribution is divided into two regions – a region of non-rejection and a region where the null hypothesis is rejected.
1. Allen Machines specializes in developing weed-harvesting equipment that is used to clear small lakes of weeds. Allen Machines is contemplating the construction of a machine that would harvest weeds on narrow rivers and waterways. The activ..
Test the hypothesis that no difference exists between the groups at α = .05 and perform and report all related tests and statistics.
The probability distribution for the possible results of an experiment is given, Determine the mean of the distribution.
The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 a..
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