According to the American Time Use Survey, the mean number of hours each day Americansage 15 and older spend eating and drinking is 1.22. A researcher wanted to know if Americansage 15 to 19 spent less time eating and drinking. After surveying 50 Americans age 15 to 19 andrunning the appropriate hypothesis test, she obtained a p-value of 0.0329.1. State the null and alternative hypothesis this researcher used.2. This is a-tailed test since.(complete this sentence).3. Interpret the p-value.4. Determine and explain what a Type I error would be for this situation. What level ofseverity is this for this context? (How bad is it if this conclusion is incorrect based on thissample?)5. According to the same survey, people aged 25 - 54, employed with children spend 1 hourper day eating / drinking. Does this seem accurate for you (depending on your age)?

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Answered: According to the American Time Use…

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 class I'm taking is statistics! I am completely stuck. Need help. I have attached the problem. Please view attachment before answering. Thank you!
You are a consumer advocate. A particular brand of tires state that they last for 50,000 miles before it needs to be replaced. You solicit survey responses from people that own the tire to ask how many miles their tire lasted before they had to replace them. The survey results showed an average life-span of 46,500 miles with a standard deviation of 9,800 miles. Which statistical test would be best to determine if the tires last significantly less than 50,000 miles? z-test one-sample t-test independent samples t-test ANOVA
Vegas Repair is a company that specializes in smartphone repair. They want to implement a policy that all employees should be able to fix a standard iPhone screen in less than 20 minutes. They want you to design a hypothesis test to help determine if an employee is meeting the new company standard. From the last quiz we know the population standard deviation of all screens repairs to be 5 minutes. To run your test, you take a sample of 10 screen repair times for an employee at the Vegas Store: Phone 1 2 3 4 5 16 7 8 9 10 Screen repair time 15 12 20 24 16 13 12 22 14 27 Design and run a hypothesis test with alpha = .04 and use it to determine if the employee would meet this new policy requirement and is fixing screens in less than 20 minutes on average. Please use the rejection region approach and show all your work (I want to know step by step if possible) What is the p-value of your test?
Suppose that Dietitians recently recommended a 400 cal per meal and take her children of the age of the data set. To see if both groups adhere to the guideline follow the steps to develop and test a statistical hypothesis. Test to see if us groups means are different from 400 calories. You have two data sets so you'll be completing the process twice. Use 0.05 as a level of significance and make sure to report any important statistic with your results (e.g., mean of each group, standard deviation of each group, test stastistic (are you using t or z?), rejection region and p value). Data: Children Participated Children Did Not Participate 435.16 414.61 338.99 503.46 488.73 425.22 590.28 288.77 582.59 184 635.21 299.73 249.86 350.65 441.66 394.94 572.43 261.55 357.78 295.28 396.79 139.69 298.38 462.78 282.99 179.59 368.51 301.75 388.59 436.58 256.32 371.39 408.82 469.02 424.94 378.09 477.96 287.31 428.74 448.55 432.52 332.64 428.27…
At a certain university, the average cost of books was $390 per student last semester and the population standard deviation was $75. This semester a sample of 55 students revealed an average cost of books of $415 per student. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
The mean length of lumber is supposed to be 8.5 feet. A builder wants to check whether the shipment of lumber she receives has the correct length, so she conducts a hypothesis test. She measures 61 randomly selected pieces of lumber and finds they have a mean of 8.3 feet and standard deviation of 0.75 feet. With the help of Mathematics & R Studio: Conduct a hypothesis test to see whether she is justified to believe that the average is shorter than 8.5 feet?
Of interest is whether the percent of managers at High Tech Inc. that pay over $8 per day for lunch is the same as the percent of technicians. Sixty managers are surveyed and forty-six of them pay over $8 per day for lunch. One hundred forty-nine techniciansare surveyed and ninety-eight of them pay over $8 per day for lunch. The hypothesis test to use is???? independent group means, population standard deviations known independent group means, population standard deviations unknown matched or paired samples two proportions
Explain how each of the following influences the value of the z-score in a hypothesis test a. increasing the difference between the sample mean and the original population mean b. increasing the population standard deviation c. increasing the number of scores in the sample
According to the College Board, scores on the math section of the SAT Reasoning college entrance test for the class of 2010 had a mean of 516 and a standard deviation of 116. Assume that they are roughly normal.One of the quartiles of the scores from the math section of the SAT Reasoning test is 438. The other quartile is _______.
IQ tests are approximately normally distributed with a mean of 100 for adults. A tech company CEO wants to conduct a hypothesis test to see if the average IQ of employees at high-tech firms in California is higher than average. What is Type I error in the context of this problem?
please answer a, b, c
A sample of size 126 will be drawn from a population with mean 26 and standard deviation 3. Use the TI-84 calculator. Part 1 of 2 Find the probability that x will be between 25 and 27. Round the answer to four decimal places. The probability that x will be between 25 and 27 is Part 2 of 2 th Find the 55 percentile of X. Round the answer to two decimal places. The 55th percentile is

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