Test the claim that the mean GPA of night students is smaller than 2.5 at the 10% significance level. The population standard deviation for this group is known to be 0.16.The null and alternative hypotheses for this test are:$H_0: \mu \leq 2.5 $ $H_A: \mu > 2.5 $ $H_0: \mu \geq 2.5 $ $H_A: \mu < 2.5 $ The test is: - left-tailed - right-tailed Based on a sample of 30 people, the sample mean GPA was 2.47. *Hint: Before you find the p-value below, calculate the test statistic to two decimal places.*The p-value is: ___________ (to 4 decimals) The significance level as a decimal is: ___________Based on this, - fail to reject the null hypothesis, $H_0$- reject the null hypothesis, $H_0$

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Answered: Test the claim that the mean GPA of…

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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State the null and alternative hypotheses. John, a restaurant owner, suspects that prices of tomatoes in Bury are higher than the rest of Manchester. He finds that the city average price of a certain type of premium tomatoes is £20.9 with standard deviation £0.95. He takes a sample of this type of tomato from 5 local Bury stores and obtains an average price of £22.46.
Use the following scenario to answer the next 6 questions. An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 30 engines and the mean pressure was 4.8 psi with a standard deviation of 1 psi. If the valve was designed to produce an overall mean pressure of 5.0 psi, is there sufficient evidence at the 10% level of significance that the valve performs below specifications? The appropriate hypothesis test for this scenario is: Group of answer choices right-tailed two-tailed left-tailed
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