There are many possible examples 6 the sample size is

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: then s = 1.241224 = 1.114103. 1 (d) Yes. For example if 15 scores are 90 and 5 scores are 50 then X = and the median is 90. (There are many possible examples.) 6. The sample size is 40 + 20 + Yi = 5 (Xi − 32) = −160 + 5 Xi . So Y = 10 5. The conversion is 20 + 9 + 10 = 100. 9 9 s2 Y = ( 5 )2 s2 X 9 = 25 81 · 16 = 400 81 and sY = | 5 |s2 9X = 5 9 ·4= 20 9. −160 9 1 20 (15 · 90 + 5 · 50) + 5X = 9 −160 9 = 80 ˙ + 5 68 = 20; 9 (a) Note that regarding density, the bins are supposed to be consecutive, i.e. 0 − 49 actually means 6. The table below is − = 50. [0, 50) and has length 50 the0data table completed with relative frequency and density. Note that for the sake of simplicity, we decided to count 0 − 49 as a class of size 50. There are actually 50 Class Interval Frequency Rel.frequency Density possible integers in this box. (For the sake of grading, we could argue that this a continuous 40 0.4 interval [0,50) (size[0,50) [0,49] (size 49), which would .4 valid 50−0 = as.008 choices 0 well.) 0-49 50) or 40 100 = 0 be 20 0 .2 50-69 [50,70) 20 Class interval Frequency Relative Frequency = 0.2 100 Density 70−50...
View Full Document

This document was uploaded on 02/15/2014 for the course MATH 231 at Lehigh University .

Ask a homework question - tutors are online