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When finding percentiles, if locator L is not whole number, one procedure is to interpolate so that locator of 23.75, for instance, leads to a value which is 3/4 of way between 23rd and 24th scores. Use this method of interpolation to find for set of test scores below.
51546468727476 83 89 94 99
Use the following data to write the normal equations of the linear regression between Y and X, and find the least squares regression.
If not what would be a better testing strategy? Could you form a Null Hypothesis or an Alternative Hypothesis? If yes, what would they be.
I tossed a coin 6 times and recorded the outcomes - H for heads and T for tails. The first set of tosses yielded HTHTTH and the second set of tosses yielded TTTHHH. Which set of tosses is more probable to happen? And why?
If writing scores for population have standard deviation of s = 20, does sample give sufficient evidence to conclude that new composition course has significant effect? Suppose a two tailed test with a = 0.05.
Find a peer-reviewed article that provides an example of a study where the researchers utilized a one sample chi-square OR a two sample chi-square. Briefly describe the study and discuss its findings in your own words.
Assume then money spent is uniformly distributed between these amounts. Determine the mean amount spent on insurance?
The question of interest is whether mean GPA is the same or differs for different weight attitude populations. Minitab output for the study is given above. The mean square error (MSE) in this study is:
Evaluate the result in part c with the decision using the expected value approach.
A new group comes along and that only has 5 people. Their weights are also measured initially and after 9 weeks. What would be the most accurate methodology for determining the percentage of weight loss for this new group?
Find a 99% confidence interval for the difference in the mean number of calls between night and day.
At the 0.01 level of significance, is there evidence to support the professor's claim?
A researcher believes that if she uses a different text the students will score differently on the standardized test but she doesn't know what the difference is. The test had a mean of 110 and a σ of 12.
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