A sample of n = 11 U.S. males, age 18-24 years, are measured for height and weight. Let x denotethe height in inches, and let y denote the weight in pounds. The summary data areΣ--761, Συ-1761 , Σα 52729, Σν-286273, Συ- 122234From these we calculate Sra81.636, Syy = 4352.9, Sey = 394.8YY(Use these values in this and the following questions.)Find the regression line y == bo + b1x.(Note: normally we would put a circumflex over the y: that is, "y-hat," but that notation is notavailable in the standard math editor.)

Find Regression line equations from ∑x = 761, ∑y = 1761, ∑x2 = 52729, ∑y2 = 286273, ∑xy = 122234, n…

Answered: A sample of n = 11 U.S. males, age…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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An agricultural scientist tests six types of fertilizer, labeled A, B, C, D, E, and F, to determine whether any of them produces an increase in the yield of lima beans over that obtained with the current fertilizer. For fertilizer C, the increase in yield is statistically significant at the 0.05 level. For the other five, the increase is not statistically significant. The scientist concludes that the yield obtained with fertilizer C is greater than that of the current fertilizer. Explain why this conclusion is not justified.
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Resistors labeled as 100 Ω are purchased from two different vendors. The specification for this type of resistor is that its actual resistance be within 5% of its labeled resistance. In a sample of 180 resistors from vendor A, 150 of them met the specification. In a sample of 270 resistors purchased from vendor B, 233 of them met the specification. Vendor A is the current supplier, but if the data demonstrate convincingly that a greater proportion of the resistors from vendor B meet the specification, a change will be made. a) State the appropriate null and alternate hypotheses. b) Find the P-value. c) Should a change be made?
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