1. Two packaging machines cause some amount of production losses while packaging different products. Aproduction engineer wants to compare these two machines from the point of production losses. He calculatedthe production losses of two machines as in the Table below. Find a 90% confidence interval for u, - H, andinterpret.Product TypeMachine XMachine Y12.7313.899.7510.3213.7817.018.3710.4311.7111.3915.4717.9914.5616.028.11.7411.99.7613.111012.4713.88

Obtain the 90% confidence interval for the mean difference between the two machines X and Y. The 90%…

Answered: 1. Two packaging machines cause some…

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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4. A poll was conducted in a very small community in country X to see if residents are for or against a new policy that requires them to wear a mask. A total of 500 persons were surveyed. Of the 500 surveyed 200 are against wearing a mask. Compute a 90% confidence interval for the true percent of residents who are against the new policy, and interpret the confidence interval.
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Brian makes many predictions, but only 37% of them come true. The accuracy of the predictions are independent. Jack makes a bet with Joan on the next 4 days about Brian’s predictions. Jack gets 10 dollars when Brian's prediction is correct but loses 5 dollars when Brian is wrong. Let X be the total amount of money won by Jack for every correct prediction of Brian in the next 4 days. Find Jack’s expected earnings, Specify properties of expectations used if any.
A random sample of 500 patients with diabetes were weighed before and after switching to a new drug and the change in their weight is computed for each patient. The resulting 90% confidence interval for the average change in the weight of diabetes patients is (1, 5) expressed in pounds. Which of the following can be the 95% confidence interval generated from the same data?
The following table shows 1000 Engineer school applicants classified according to scores made on a college entrance examination and the quality of the high school from which they graduated, as rated by a group of educators: Quality of High Schools Superior Scores Average Low 300 100 High 260 340 A 95% confidence interval for the population proportion of applicants that a low score on the examination and graduated from an average high school is: (0.081 , 0.118) None of these (0.271,0.328) O (0.310, 0.369)
2 different treatments were used to speed the relief time (in minutes) of migraines. 8 subjects received each treatment. The recovery times are listed below. Treatment 1: 20 19 29 25 34 32 39 38 Treatment 2: 18 18 16 17 29 28 21 37 Construct a 90% confidence interval for the difference in the relief time between the 2 treatments.
Please let me know if I calculated relative risk correctly. Thank you for your assistance.
The table contains pulse rates collected from males, who are non-smokers but do drink alcohol. The before pulse rate is before they exercised, and the after pulse rate was taken after the subject ran in place for one minute. Compute a 90% confidence interval for the mean difference in pulse rates from before and after exercise. Round to two decimal places. Pulse Rate of Males Before and After Exercise Pulse before 49 89 51 51 73 75 74 65 50 66 53 89 58 87 52 49 85 68 60 Pulse after 94 141 81 91 157 125 106 79 66 156 89 130 101 134 130 72 112 123 97 % confidence, it can be said that the mean difference in pulse rates from % and With before and after exercise is between %.
2. (MMC 6.43). The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitude toward school, and study habits of students. Each score ranges from 0 to 200. The mean attitude score for U.S. college students is about 110, and the standard deviation is about 25. A teacher who suspects that older students have better attitudes toward school gives the SSHA to 25 students who are at least 30 years of age. Their mean score is = 118.3. a. Assuming that o = 25 for the population of older students, carry out a test of Họ: H = Ha:u > 110 Report the P-value of your test and state your conclusion clearly. = 110 b. What are the required assumptions in part (a)?

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