I'm having a hard time with problem #11, please, help me? 11. Old Faithful Data Set 23 “Old Faithful" in Appendix B includes data from 250 randomFor Exercise 11eruptions of the Old Faithful geyser. The National Park Service makes predictions of timesto the next eruption, and the data set includes the errors (minutes) in those predictions. Theaccompanying Statdisk display results from using the prediction errors (minutes) to testthe claim that the mean prediction error is equal to zero. Comment on the accuracy of thepredictions.t TestTest Statistic, t: -8.7201Critical t:±1.9695P-Value:0.0000 Technology. In Exercises 9–12, test the given claim by using the display provided fromtechnology. Use a 0.05 significance level. Identify the null and alternative hypotheses, teststatistic, P-value (or range of P-values), or critical value(s), and state the final conclusionthat addresses the original claim.

We are given that Significance level =0.05

Answered: 11. Old Faithful Data Set 23 “Old…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The amount of contaminants that are allowed in food products is determined by the FDA (Food and Drug Administration). Common contaminants in cow milk include feces, blood, hormones, and antibiotics. Suppose you work for the FDA and are told that the current amount of somatic cells (common name "pus") in 1 cc of cow milk is currently 750,000 (note: this is the actual allowed amount in the US!). You are also told the standard deviation is 62000 cells. The FDA then tasks you with checking to see if this is accurate. You collect a random sample of 45 specimens (1 cc each) which results in a sample mean of 762004 pus cells. Use this sample data to create a sampling distribution. Assume that the population mean is equal to the FDA's legal limit and see what the probability is for getting your random sample. a. Why is the sampling distribution approximately normal? b. What is the mean of the sampling distribution? c. What is the standard deviation of the sampling distribution? d. Assuming…
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In an area of the Great Plains, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushels per acre). The table shows the number of inches of rainfall and the yield (in bushels per acre). Use for problem #17 and #18. Rainfall (in inches), x 9.8 8.1 12.7 11.8 18.1 9.6 6.3 14.9 15.3 Yield (bushels per acre), y 48.5 44.2 56.8 57 80.4 47.2 29.9 74 76.8 17. Compute the linear correlation coefficient between the two variables above. (Round to thousandths.) 18. Determine whether a linear relation exists. (Show work to justify answer.)
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