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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Tall Clubs The social organization Tall Clubs International has a requirement that women must be at least 70 in. tall. Assume that women have normally distributed heights with a mean of 63.7 in. and a standard deviation of 2.9 in. (based on Data Set 1 “Body Data” in Appendix B). a. Find the percentage of women who satisfy the height requirement. b. If the height requirement is to be changed so that the tallest 2.5% of women are eligible, what is the new height requirement?
Activity 2: Toby's Trucking Company determined that the distance traveled per truck per year is normally distributed, with a mean of 50 thousand miles and a standard deviation of 12 thousand miles. a. What would be your conclusion if the proportion of trucks travelled between 34 and 50 thousand miles in a year? b. How many miles will be traveled by at least 80% of the trucks? c. How many miles will be traveled by over 40% of the trucks? d. What are your answers to (b) through (c) if the standard deviation is 10 thousand miles?
PLS. Solve Quickly Applications Problems According to a Sallie Mae survey and credit bureau data, in 2008, college students carried an average of $3173 debt on their credit cards (USA TODAY, April 13, 2009). Suppose that cur- rent credit card debts for all college students have a normal distribution with a mean of $3173 and a standard deviation of $800. Find the probability that credit card debt for a randomly se- lected college student is between $2109 and $3605.
A? Thanks
A developmental psychologist is interested in studying how long babies gaze at a photograph of a human face. To test this question, she shows a picture to a sample of six babies and records the length of their gaze in seconds. The data are as follows: 12, 17, 18, 20, 20, 29. Calculate the mean, median, mode, range, variance and standard deviation for the sample.
13
The table below gives the number of hours spent watching TV last week by a sample of 24 children. 31 28 60 63 33 75 73 87 46 82 70 50 47 50 39 83 25 73 33 74 87 85 97 12 Range = Standard Deviation =
C, D, E, F
How long do people spend travelling to work?the answer may depend on where they live.here are the travel times in minutes for 15workers in north Carolina.chosen at random by census bureau: 5 10 10 10 10 12 15 20 20 25 30 30 40 40 60 What is the standard deviation for travel time for these 15north Carolina workers
K A survey found that women's heights are normally distributed with mean 63.4 in and standard deviation 2.5 in. A branch of the military requires women's heights to be between 58 in and 80 in. a. Find the percentage of women meeting the height requirement. Are many women being denied the opportunity to join this branch of the military because they are too short or too tall? b. If this branch of the military changes the height requirements so that all women are eligible except the shortest 1% and the tallest 2%, what are the new height requirements? Click to view page 1 of the table. Click to view page 2 of the table. correct: 1 C... a. The percentage of women who meet the height requirement is (Round to two decimal places as needed.)
6
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.

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