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Plan-aldosterone concentration (pmoliner) IA USE SALT ||| * ge of African American children have levels s 300 pmol/L if normality is assumed deviation of 253 pmol/L, then what percentage of Caucasian children have levels s 300 pmol/L if normality is assumed moyang bundy aut us nous sy NPI

Plan-aldosterone concentration (pmoliner) IA USE SALT ||| * ge of African American children have levels s 300 pmol/L if normality is assumed deviation of 253 pmol/L, then what percentage of Caucasian children have levels s 300 pmol/L if normality is assumed moyang bundy aut us nous sy NPI

MATLAB: An Introduction with Applications
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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Well-known racial differences in blood pressure exist between Caucasian and African American adults. These differences generally do not exist between Caucasian and African American children. Because aldosterone levels have been related to blood-pressure levels in adults in previous research, an investigation was performed to look at aldosterone levels among African American children and Caucasian children. (Assume that plasma-aldosterone levels can be measured exactly and no continuity correction is necessary. Round your answers to two decimal places.) USE SALT (a) If the mean plasma-aldosterone level in African American children was 235 pmol/L with a standard deviation of 213 pmol/L, then what percentage of African American children have levels ≤ 300 pmol/L if normality is assumed? (b) If the mean plasma-aldosterone level in Caucasian children is 398 pmol/L with standard deviation of 253 pmol/L, then what percentage of Caucasian children have levels ≤ 300 pmol/L if normality is assumed? Plasma-aldosterone concentration (pmol/liter) (c) The distribution of plasma-aldosterone concentration in 53 Caucasian and 46 African American children Plasma-aldosterone concentrations in 53 Caucasian and 46 African American children. Values within the shaded area were undetectable (< 50 pmol/L). The solid horizontal lines indicate the mean values, and the broken horizontal lines indicate the mean ±se. The concept of standard error (se) is discussed in Chapter 6. 1200 1100 1000 900 800 700 600 500 400 300 % 200 100 % H Caucasians ........ shown in the figure below. African Americans. Ⓒ Does the assumption of normality seem reasonable? Why or why not? (Hint: Qualitatively compare the observed number of children who have levels ≤ 300 pmol/L with the expected number in each group under the assumption of normality. Give your answers in percent.)
Transcribed Image Text:Well-known racial differences in blood pressure exist between Caucasian and African American adults. These differences generally do not exist between Caucasian and African American children. Because aldosterone levels have been related to blood-pressure levels in adults in previous research, an investigation was performed to look at aldosterone levels among African American children and Caucasian children. (Assume that plasma-aldosterone levels can be measured exactly and no continuity correction is necessary. Round your answers to two decimal places.) USE SALT (a) If the mean plasma-aldosterone level in African American children was 235 pmol/L with a standard deviation of 213 pmol/L, then what percentage of African American children have levels ≤ 300 pmol/L if normality is assumed? (b) If the mean plasma-aldosterone level in Caucasian children is 398 pmol/L with standard deviation of 253 pmol/L, then what percentage of Caucasian children have levels ≤ 300 pmol/L if normality is assumed? Plasma-aldosterone concentration (pmol/liter) (c) The distribution of plasma-aldosterone concentration in 53 Caucasian and 46 African American children Plasma-aldosterone concentrations in 53 Caucasian and 46 African American children. Values within the shaded area were undetectable (< 50 pmol/L). The solid horizontal lines indicate the mean values, and the broken horizontal lines indicate the mean ±se. The concept of standard error (se) is discussed in Chapter 6. 1200 1100 1000 900 800 700 600 500 400 300 % 200 100 % H Caucasians ........ shown in the figure below. African Americans. Ⓒ Does the assumption of normality seem reasonable? Why or why not? (Hint: Qualitatively compare the observed number of children who have levels ≤ 300 pmol/L with the expected number in each group under the assumption of normality. Give your answers in percent.)
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