
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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How to calculate variance?
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- In analysis of variance the term factor refers to? A dependent variable an independent or quasi independent variable A treatment mean a treatment totalarrow_forwardA regression was run to determine if there is a relationship between the happiness index (y) and life expectancy in years of a given country (x). The results of the regression were: ý=a+bx a=0.137 b=0.082 (a) Write the equation of the Least Squares Regression line of the form (b) Which is a possible value for the correlation coefficient, r? O-1.338 O-0.84 O 1.338 O 0.84 (c) If a country increases its life expectancy, the happiness index will O increase O decreasearrow_forwardHelp with questions both a and b.arrow_forward
- Lucas and Michael conduct a study to determine if drinking Gatorade, Powerade, or a Monster energy drink causes one to run faster in a 100 meter dash. They recruit 100 athletes and randomly assign each athlete to drink 16 ounces of Gatorade, Powerade, or a Monster energy drink. They then measure how fast the run the 100 meter dash. What type of test should they conduct? Correlation/Regression Independent t-test One-way ANOVA Dependent t-testarrow_forwardonsider the following data: x 3 4 5 6 7 P(X=x) 0.2 0.1 0.2 0.1 0.4 Step 2 of 5 : Find the variance. Round your answer to one decimal place.arrow_forward-Please do on excel and write the excel fomula for each answer you give. I cannot figure this question out. A business school has a goal that the average number of years of work experience of its MBA applicants is more than three years. Historical data suggest that the variance has been constant at around six months, and thus, the population variance can be assumed to be known. Based on last year’s applicants, it was found that among a sample of 47, the average number of years of work experience is 3.1. Can the school state emphatically that it is meeting its goal? Formulate the appropriate hypothesis test and con-duct the test.arrow_forward
- What is the Weakness of Variance?arrow_forwardAn engineer wants to determine how the weight of a gas-powered car, x, affects the gas mileage, y. Would it be reasonable to use the least-squares regression line to predict the miles per gallon of a hybrid gas and electric car? Why and why not?arrow_forwardCoefficient of determination is the square-root of the coefficient of correlation. Select one: True Falsearrow_forward
- ANOVA looks at both between subjects and within subjects variance. Looking at variance in one condition (for example, everyone who drank espresso shots) is: which one below? Within subjects variance Internal variance All variance Between subjects variancearrow_forwardTextbook: Statistics for the Behavioral SciencesGregory J. Privitera Please show your work-Concept and Application Problems (Pg.133) 1. If Sample 1 has a variance of 4 and Sample 2 has variance of 32, can we tell which sample had a larger range? If so, which sample had a greater range?arrow_forwardWhy is the concept of variability important?arrow_forward
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