What is the value of the sample test statistic? (Round your answer to three decimal places.) The manufacturer of a sports car claims that the fuel injection system lasts 48 months before it needs to be replaced. A consumer group tests this claim by surveying a random sample of 10 owners who had the fuel injection system replaced. The ages ofthe cars at the time of replacement were (in months):25 48 47 4853 4630 51 4252n USE SALT(i) Use your calculator to calculate the mean age of a car when the fuel injection system fails x and standard deviation s. (Round your answers to four decimal places.)X = 44.2monthss =9.4257months(ii) Test the claim that the fuel injection system lasts less than an average of 48 months before needing replacement. Use a 5% level of significance.What are we testing in this problem?O single proportionO single mean(a) What is the level of significance?0.05State the null and alternate hypotheses.О Но: и 3D 48;B Hi: и < 48О Но: и3D 48%;B Hi: и > 48O Ho: p = 48; H1: p < 48О Но: и 3D 48; Hi: и + 48О Но: р%3D 48; Hi: р# 48О Но: р %3D 48; Hi: р > 48(b) What sampling distribution will you use? What assumptions are you making?O The Student's t, since we assume that x has a normal distribution with unknown o.O The standard normal, since we assume that x has a normal distribution with known o.O The standard normal, since we assume that x has a normal distribution with unknown o.O The Student's t, since we assume that x has a normal distribution with known o.What is the value of the sample test statistic? (Round your answer to three decimal places.)|-1.28

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Description: What is the value of the sample test statistic? (Round your answer to three decimal places.) The manufacturer of a sports car claims that the fuel injection system lasts 48 months before it needs to be replaced. A consumer group tests this claim by s

The sample mean is 44.2 and the standard deviation is 9.4257.

Answered: What is the value of the sample test…

Math

Statistics

What is the value of the sample test statistic?

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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