How many subjects participated in an independent-samples t-test if a researcher reports, t (20) = 3.68, alpha = .05, two-tail?

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Q: If X and Y are two random variables, then the covariance of aX, bY is cov(aX,bY) = ab cov(X,Y)= abCr

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Q: If X and Y are two random variables, then the covariance is Cxy = Ry -XY

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Q: 16-20. The Philippine constitution calls for 16 representatives to be chosen from these cities. The…

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Q: The island of Yapoah grows two types of potatoes: red and purple. You wonder if the purple potatoes…

A: Solution:  Given information: n1= 52n2= 45x1= 115x2= 108s1= 23s2= 30 Assumed that the population…

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Q: Find the area between z = -0.18 and z = 2.0 and plot them in a normal curve. 30 -20 -1o 20 30 Z =…

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Q: heck if there is a significant difference between the 1st and 2nd measurement of weight at 10% level…

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Q: A researcher is interested in investigating whether the military branch a person signs up for and…

A: Formula : Test statistic

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Q: e correlation between the height and weight of children aged 6 to 9 is found to be about r = 0.64.…

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Q: A student takes a multiple-choice test that has 8 questions. Each question has four choices. The…

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Q: he accompanying data table lists the magnitudes of 50 earthquakes measured on the Richter scale.…

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Q: The data below is 13 observations of Math SAT scores (x) and scores on Math placement test (y).…

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Q: During a barangay census, the following information was acquired. 15 children out of 23 are…

A: Given that  During a barangay census, the following information was acquired.   15 children out of…