se the listed amounts of Strontium-90 (in millibecquerels) in asimple random sample of baby teeth obtained from Pennsylvania residents born af-ter 1979 (based on data from "An Umexpected Rise in Strontium-90 in U.S. Decid-uo s Teeth in the 1990s," by Mangano, et. al, Science of the Total Environment).155 142'149 130 151 163 151 142156 133 138 161 128 144 172 137 151 166 147 163145 116 136 158 114 165 169 145 150 150 150 158 151 145 152 140 170 129 188 1565. Dotplot Construct a dotplor of the amounts of Strontium-90. Whar does the dorplot sug-gest about the distribution of those amounts?6. Stemplot Construct a stemplot of the amounts of Strontium0. What does the stemplorsuggest about the distribution of those amounts?7. Frequency Polygon Construct a frequency polygon of the amounts of Strontium-90.For the horizontal axis, use the midpoints of the class intervals in the frequency distribution inExercise 18 from Section 2-2: 110-119. 120-129, 130-139. 140-149, 150-159; 160-169,170-179, 180-189.8. Ogive Construct an ogive of the amounts of Strontium-90. For the horizontal axis, use thedass boundaries corresponding to the class limits given in Exercise 7. How many of theamounts are below 150 millibecquerelse

Given is the following set of numbers: 155 142 149 130 151 163 151 142 156 133 138 161 128 144 172…

Answered: se the listed amounts of Strontium-90…

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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1. Question Details DevoreStat9 7.SE.506.XP. [4060976] The following observations were made on fracture toughness of a base plate of 18% nickel maraging steel (in ksi ✓in., given in increasing order)]: 65.5 71.9 72.8 73.1 73.4 73.5 75.5 75.7 75.8 76.1 76.2 76.2 77.0 77.9 78.1 79.6 79.7 79.9 80.1 82.2 83.7 93.8 Calculate a 99% CI for the standard deviation of the fracture toughness distribution. (Round your answers to one decimal place.) 3.8 8.7 ksi vin Is this interval valid whatever the nature of the distribution? Explain. O The interval is always valid. O The distribution needs to be skewed to the right. O The distribution needs to be approximately uniform. O The distribution needs to be approximately normal.
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