40. Growth Plates The ability to determine the age of someindividuals can be difficult if there are not quality governmentrecords of birth. Bone growth takes place at the growth plates atthe end of long bones. Once all growth plates fuse, growth stops,and an individual is considered a biological adult. The age atwhich growth plates fuse for males is approximately normallydistributed with a mean of 19 years and a standard deviation of15.4 months. Source: Tim Cole, "People Smugglers, Statistics, and BoneAge," Significance Magazine, June 2012: 9(3).(a) What is the probability a male's growth plates fuse afterage 20?(b) What is the probability a male's growth plates fuse beforeage 17?(c) What proportion of a male's growth plates fuse between 15and 17 years of age?(d) Would it be unusual for a male's growth plates to fuse whenhe is 23 years old? Explain.

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Answered: 40. Growth Plates The ability to…

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. IQ scores have a mean of 100 and a standard deviation of 16. Albert Einstein reportedly had an IQ of 160. Convert Einstein's IQ score to a z score. a. b. If we consider "usual IQ scores to be those that convert z scores between -2 and 2, is Einstein's IQ usual or unusual? C. The organization MENSA, which calls itself the "high IQ society", requires a score of 130 or higher. What percent of adults would qualify for membership? 2. In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0 represents the worst possible life and 10 represents the best possible life. The responses were normally distributed, with a mean of 5.4 and a standard deviation of 2.2. Find the probability that a randomly selected study participant's response was: a. Less than 4 b. Between 4 and 6 c. More than 8 3. The red blood cell count for a population of adult males can be approximated by a normal distribution, with a mean of 5.4 million cells…
COMMUNICATION 1) Explain why the following statements are false: a) The value of every observation in a set of data is taken into account when calculating mean. b) The standard deviation is expressed without units. c) Quartiles and percentiles are different measures because they are calculated differently. d) For grouped data, the measures of spread are just as accurate as with raw data. f) The interquartile range includes the upper 25% and lower 25% of the data. g) A z-score indicates how far the standard deviation lies from the mean.
Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
A? Thanks
2. The Librarian A librarian figured out how many books were checked out by some people last year by looking at their accounts. Checking out books from the library 1. 2 3 4 5 6 Books checked out a. What was the average number of books checked out from the library last year? b. If a new person came into the library and checked out 20 books, would the standard deviation increase, decrease, or stay about the same? Justify your answer. If a new person came into the library and checked out 3 books, would the standard deviation increase, decrease, or stay about the same? Justify your answer. C. 一 +****
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C, D, E, F
13 see picture
Exploration 4. Assume that 5 students taking a statistics course having the following ages: 17 33 29 20 45 Mean a. Find the mean and population standard deviation of the data set of ages. Standard Deviation b. Assume that random samples of size n = 2 are selected with replacement. Make a list of all of the possible samples of size 2. They are selected with replacement, i.e. the same student could be chosen twice. Also, selecting the age of 17 first and 33 second is different from selecting 33 first and 17 second. You need to make a list of all the possible outcomes (there should be 25.....) Find the mean of each sample and construct a table representing the sampling distribution of the mean.
You may need to use the appropriate appendix table or technology to answer this question. If we model after-tax household income with a normal distribution, then the figures of a study imply the information in the following table. Assume that the distribution of incomes in each country is normal. Country Country A Country B Country C Country D Country E Mean Household Income $38,000 $21,000 $40,000 $14,000 $32,000 Standard Deviation $26,000 $38,000 $26,000 $17,000 $19,000 What percentage of households in Country A had an income of $45,000 or more? (Round your answer to the nearest percent.) %

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