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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There are many real-life problems like the traveling salesperson problem.For example, the telephone company must decide on the most efficient route for a worker to collect the money from public telephones. Giveanother example.
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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Please check my attached case problem.
The teacher from Problem 21 also tried a different approach to determining whether changing answers helps or hurts exam grades. In another class, students were told to review their final exams and change any answers they wanted to before turning them in. However, the students had to indicate both the original answer and the changed answer for each question. The teacher graded each exam twice, once using the set of original answers and once with the changes. In the class of n- 22 students, the exam scores improved by an average of MD - 2.5 points with the changed answers. The standard deviation for the difference scores was s = 3.1. Are the data sufficient to conclude that rethinking and changing answers can significantly improve scores? Use a one-tailed test at the .01 level of significance. (1) Ho: [ Select ] [ Select ] [ Select ] H1: Select ) [ Select ] [ Select ] (2) a - [ Select ] df - [ Select J Critical region boundary/boundaries: [ Select ] [ Select ] (3) Estimated Standard…
The battle to life achievement requires a lot of patience. Patience is accepting the ups and downs in life. An individual's maturity is measured by how long he can wait and battle between achievement and reward. The enjoyment to a reward is increased when one has waited a long time to receive it. Life is just like a carousel ride. One experience the ups and downs of the ride and a starting point or an initial ride and when time comes, the ride now terminate. A carousel ride can be repeated and be experienced once more if one decided to continue the ride. The experience depends on a person's choice to where he will sit. Some prefers on the outside or others on the inside row but still they will stop on the same point to where they can descend. One summer, you and your friend decided to go to an amusement park and ride the carousel. You always select a horse on the outside row while your friend chose the row closest to the center. These rows are 6 meters and 4 meters from the center,…
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