II. PROBLEM SOLVING. Solve the following problems. SHOW YOUR COMPLETE SOLUTION1. A tire manufacturer claims that its tires have a mean life of 40,000 kms. A random sample of 46 of these tires is tested and the sample meanis 38,000 kms. Assume that the populations standard deviation is 2,000 kms and the lives of tires are approximately normally distributed.a. . What test statistic should be used?b. What is the computed value at 5% level of significance?2. The manager of a certain TV station claimed that the average rating of people watching their noontime teleserye in Manila is 62.5. Aresearcher randomly selected 25 people and asked them their favorite noontime teleserye. He computed the mean and obtained 67.8 withstandard deviation of 15.9. Is there a reason to believe that the manager is correct? Use 0.01 as the level of significance.

here AS PER GUIDELINES I HAVE CALCULATED FIRST MAIN QUESTION PLZ REPOST FOR REMAINING Here given ,…

Answered: a. .What test statistic should be used?…

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 Open Syllabus Project What statistical analysis could be used to determine of the mean percentage of psychology readings assigned in the Midwest was significantly different than in all of the United States? Single-sample t-test In which of the following four categories does this situation fall? a. only scale variables b. nominal independent variables, scale dependent variable c. only nominal variables d. any ordinal variables (that cannot be treated as a nominal)
The next seven questions refer to the following scenario: A random sample of 16 Porsche drivers yielded an average age of 50 years with a variance of 9 years and a random sample of also 16 Ferrari drivers yielded an average of 47 years with a variance of 25 years. Porsche Driver Ferrari Driver n 16 16 mean 50 47 Variance 25 Conduct the following hypothesis test at a=0.05. HO: Mean Age Porsche Drivers Mean Age Ferrari Drivers Assume unequal variance.
Calculate the appropriate test statistic based on the information provided (round your answer to 4 decimal places): Research Question: Do less than 50% of people who travel for work use airlines are their primary means of travel? Population proportion = 50% Number of people from sample who said they primary use airlines as their method of travel = 12 Sample size = 31
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We want to determine if the percent of home runs hit by left-handed batters is greater than that of right-handed batters. What type of test should be used? OTwo sample z-test OTwo sample t-test O Single sample z-test Single sample t-test
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a. .What test statistic should be used? b. What is the computed value at 5% level of significance?