Using the information provided below, calculate the pooled variance (s) when needed and thenestimated standard error (SM₁-M₂):a) n₁=28, SS₁ = 88 | n2 = 32, SS₂ = 76 = ²b) n₁=9 SS₁=1554 | n² = 13, SS₂ =1492 : s²/c) n₁ =20,s² = 0.88 | n2 =20, s² = 0.75 : s² =d) n₁ =18, s² = 2.38 | n2 = 16, s² =3.30 : s11SM₂-M₂SM₂-M₂SM₁-M₂²SM₁-M₂²

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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 mean age of children at the X College daycare center is 6. The ages are skewed in a negative direction by a large number of 3 and 4 year old students. The variance of ages is 5.1. At least 66% of the children will be between what two ages?
Please also find variance and standard deviation
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Perform the analysis of variance (ANOVA) at the a = 0.05 to identify is there any significant differece in the mean between the populations. It is known that there are three populations with five samples in each popula- tion in this analysis. (c) Source of variation Sum of squares 944.9333 Between Within 2224.8000 Table 4.1: Sum of squares
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A standardized exam’s score are normally distributed. In a recent year, the mean test score was 1477 and the standard was 315. The test scores of four students selected at random 1860 1230, 2160, and 1360. Find the Z- score that correspond to each value and determine wether any of the values are unusual. The Z-score for 1860 is-The Z-score for 1230 is-The Z-score for 2160 is-The Z-score for 1360is-
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A sample of n = 25 scores has a mean of x̅ = 65 and an estimated standard error of sM = 2 points. What is the sample variance?
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