Mathematics, 23.10.2019 20:50 kony345p
Words were displayed on a computer screen with background colors of red and blue. results from scores on a test of word recall are given below. use a 0.05 significance level to test the claim that the samples are from populations with the same standard deviation. assume that both samples are independent simple random samples from populations having normal distributions. does the background color appear to have an effect on the variation of word recallscores?
n x s
red background 35 15.14 5.91
blue background 37 12.42 5.42
Answers: 3
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Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14
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Words were displayed on a computer screen with background colors of red and blue. results from score...
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