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Statistics Homework: Density Curve and Percentiles - Prof. James Marron, Assignments of Statistics

Instructions and solutions for statistics homework, section 2, including calculating percentiles and drawing a density curve using excel. Problem 1.80 involves finding the mean and standard deviation, and drawing the density curve for a normal distribution of weights for distance runners with given values. Problem 1.94 asks to use excel to find the percentage above a certain value. The document also includes some intermediate calculations.

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Pre 2010

Uploaded on 03/10/2009

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Statistics – OR 155, Section 2, Homework # 3
Due: Thursday, February 1, 2007
1.80 (a: l = w = 1 b: 0.25 c: 0.5), 1.81, 1.83
Work with pencil and paper, not EXCEL
C5: A study of distance runners found a mean weight of 63.1 kg, with a standard deviation of
4.8 kg. Assuming that the distribution of weights is normal, use EXCEL to draw the density
curve of the weight distribution.
1.86 (a: 234-298, b: 234, 298), 1.87
Use Excel:
1.94
1.97 (Hint: the % above 130 =
100% - % below 130)
1.99 (see discussion above)
1.113
1.95, 1.101, 1.107, 1.109
1.116 a (-0.674, 0.674)
1.117
1.118 (0.7%)
1.122
1.123
1.125
2.1

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Statistics – OR 155, Section 2, Homework # 3 Due: Thursday, February 1, 2007 1.80 (a: l = w = 1 b: 0.25 c: 0.5), 1.81, 1.

  • Work with pencil and paper, not EXCEL C5: A study of distance runners found a mean weight of 63.1 kg, with a standard deviation of 4.8 kg. Assuming that the distribution of weights is normal, use EXCEL to draw the density curve of the weight distribution. 1.86 (a: 234-298, b: 234, 298), 1. Use Excel:

1.97 (Hint: the % above 130 = 100% - % below 130) 1.99 (see discussion above)

1.95, 1.101, 1.107, 1. 1.116 a (-0.674, 0.674)

1.118 (0.7%)