A researcher is comparing the amount of calories in two different lunch special pizzas: Hawaiian and pepperoni.Random samples of 30 Hawaiian and 30 pepperoni are taken. The mean amount of calories in the Hawaiian pizzawas 800 calories with a standard deviation of 50 calories and the mean amount of calories in the pepperoni pizzawas 1000 with a standard deviation of 100 calories. The population standard deviations are unknown butconsidered to be equal. What is the 99% confidence interval for the difference between the two populationmeans?OConfidence Interval - (800- - 1000) ± 2.576₁(50)²30Confidence Interval= (800-1000) + (2.663) (79.06,Confidence Interval=(800-1000) ± 2.663,(50)30Confidence Interval= (800-1000) + (2.576) (79.06.+(100)²301130 30+(100)²301130 30+)

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Answered: A researcher is comparing the amount 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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The Fair Isaac Corporation (FICO) credit score is used by banks and other lenders to determine whether someone is a good credit risk. Scores range from 300 to 850, with a score of 720 or more indicating that a person is a very good credit risk. An economist wants to determine whether the mean FICO score is lower than the cutoff of 720. She finds that a random sample of 60 people had a mean FICO score of 695 with a standard deviation of 65. Can the economist conclude that the mean FICO score is less than 720? Use the =α0.05 level of significance and the P -value method. State the appropriate null and alternate hyopthesis
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