d. Identify the appropriate significance level. Make sure to enter your answer as a decimal.OBe. Which calculator function should you use? Select an answerf. Find the test statistic. Write the result below, and be sure to round your final answer to twodecimal places.OTApexg. Find the critical value. Round your answer to 2 decimal places.21OT /var/app/current/assess2/questions/QuestionHtmlGenerator.php (203) : eval()'d codeon su zostan forSuppose that, on average, U.S. adults get fast food 10 times a week. In a random sample of 41 people,it was found that they ordered fast food an average of 9 times in one week. Assume the populationstandard deviation is 4.4. Perform a test at a significance level of 5% to determine whether or not thenumber of times a U.S. adult gets fast food in a week is different from 10.a. Check all of the requirements that are satisfied.

Method: The sample size is large and population standard deviation is known, so we use to z test…

Answered: /var/app/current/assess2/questions/Ques…

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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I also need the standardized test statistic and whether it's required to reject or fail to reject the hypothesis and interpret the decision in the context of the original claim
The use of chemicals is considered to increase the resistance to scratches during a painting process. The average durability was found to be 7.5 br and the standard deviation was found to be 1.5 br for the 15 parts painted using item A. The average durability was found to be 8.8 br and the standard deviation was found to be 1.2 br for the 12 parts painted using item B. What is the value of the test statistic calculated in the test that will be performed to determine which substance to choose? Determine it at the 99% confidence level with the assumption that the anacuttle variances are equal.Answer options group A)- 1,21 B) -4.68 C)- 3.26 D)-2.44
Total blood volume (in ml) per body weight (in kg) is important in medical research. For healthy adults, the red blood cell volume mean is about µ = 28 ml/kg with a standard deviation of 4.75ml/kg. Red blood cells volume that is too low or too high can indicate a medical problem. Suppose he does a hypothesis test with a significance level of 0.01. Roger has had seven blood tests and the red blood cell volumes were: 32 25 41 35 30 37 29 Roger’s null hypothesis is that his blood tests are normal and that his alternative hypothesis is that something is wrong. Symbolically, the null and hypotheses are as follows Ho: µ = 28 ml/kg and Hi: µ ≠ 28 ml/kg What value of the test statistic (z) should he report? (Sampling a Normal Distribution for the Mean µ) Group of answer choices a. 0.99 b.2.42 c.2.62 d.2.22
Assume the random variable X is normally distributed, with mean u= 44 and standard deviationo = 9. Find the 13th percentile.
The inside diameter of a randomly selected piston ring is a random variable with mean value12cm and standard deviation 0.04 cm. If ?̅ is the sample mean diameter for a random sample of25 rings, how likely is it that the sample mean diameter exceeds 12.01 cm?
An industrial engineer is conducting a time study for a work element. The select time is 4.5 minutes, and the sample standard deviation of the observed time is 20 seconds. What is the appropriate sample size if the estimate is to be 5 percent of the true average time 95 percent of the time?
The heights are measured for a simple random sample of 9 supermodels. They have a mean of x= 70.0 inches and a standard deviation ofs= 1.5 inches. A data set of 40randomly selected women who are not supermodels has a mean ofx= 63.2 inches and a standard deviation ofs= 1.27 inches. Use a 0.01 significance level to test the claim that the mean height of supermodels is greater than the mean height of women who are not supermodels.
The Ankle Brachial Index (ABI) compares the blood pressure of a patient's arm to the blood pressure of the patient's leg. A healthy ABI is 0.9 or greater. In a study, researchers obtained the ABI of 187 women with arterial disease. The results were a mean ABI of 0.86 with a standard deviation of 0.16. At the 1% significance level, do the data provide sufficient evidence to conclude that, on average, women with arterial disease have an unhealthy ABI? Set up the hypotheses for the one-mean t-test. Hou Ha: H
Assume a light bulb has a burn life that is normally distributed with a mean of 159 hours and a standard deviation of 16 hours. Suppose you sample 30 bulbs and calculate a sample average (Y) burn life. Find the probability that a give bulb in the sample has a burn life greater than 163 hours.
If the sample mean is 8, the hypothesized population mean is 4, and the population standard deviation is 2, compute the test value needed for the z test.

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