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Scrap rates per thousand (parts whose defects cannot be reworked) are compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates? Which pairs of mean scrap rates differ significantly (3 plants)?
Plant A Plant B Plant C11.4 11.1 10.212.5 14.1 9.510.1 16.8 9.013.8 13.2 13.313.7 14.6 5.9
A sample of the personal files of eight male employees revealed that during a six month period they lost the following number of days due to illness 2, 0, 6, 3, 10, 4, 1, 2. Calculate the standard deviation. show your work.
The McNemar test is a test on a 2x2 classification table when you want to test the difference between paired proportions. Chi-square test for 2X2 tables compares the tallies or counts of categorical responses between two (or more) independent grou..
Cast a die a number of independent times until a six appears on the up side of the die. Find the probability density function F(x)= P(X
Suppose your prior on θ isuniform on [0, 1] and that she then makes two shots in a row. Assume that the outcomes of thetwo shots are independent.
To determine whether there exists mean difference among the groups:
A nationwide standardized test taken by high school juniors and seniors may or may not measure academic potential, but we can nonetheless examine the relationship bewteen scores on such test and performance in college.
At 95% confidence using the critical value approach, determine if the proportion of females in the company is significantly less than 50%.
In an experiment, subjects are required to generate a "yes" or "no" decision. The probability of 'Yes' being correct is 50%. The observed probability of yes decisions is 70%.
What are the Chi-square results? What are the expected and the observed results that were found? Are they results of the Chi-Square significant? What do the results mean?
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
A random sample of 17 wolf litters in Ontario, Canada gave an average of x1= 4.9 wolf pups per litter, with estimated sample standard deviation s1 - 1.0.
The test scores of a student who took both tests are given below. A student gets a 75 on the statistics test and a 29 on the biology test. transform each test score to a z-score.
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