112, 128, 108, 129, 125, 153, 155, 132, 137 a) What is s (standard deviation)? b) What is n (sample size)? c) Calculate the standard error of the mean d) Calculate an approximate 95% confidence interval for the mean. S = Ý = SE = Σ(Yi - Y)² n-1 Σ=1 Υἱ n S E = Σ(Y²)-ny² n-1

112, 128, 108, 129, 125, 153, 155, 132, 137 a) What is s (standard deviation)? b) What is n (sample size)? c) Calculate the standard error of the mean d) Calculate an approximate 95% confidence interval for the mean. S = Ý = SE = Σ(Yi - Y)² n-1 Σ=1 Υἱ n S E = Σ(Y²)-ny² n-1

Principles Of Radiographic Imaging: An Art And A Science

6th Edition

ISBN:9781337711067

Author:Richard R. Carlton, Arlene M. Adler, Vesna Balac

Publisher:Richard R. Carlton, Arlene M. Adler, Vesna Balac

Chapter1: Basic Mathematics

Section: Chapter Questions

Problem 7RQ

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Pls help me with the given question and explain how you get your right answer pls and thank you.

1. Systolic blood pressure was measured in units of mm Hg during preventative health examination in Dallas, Texas. Here are the measurements for a subset of these patients:

112, 128, 108, 129, 125, 153, 155, 132, 137

a)What is s, the standard deviation of these data?

b)What is n, the sample size?

c)Calculate the standard error of the mean

d)Using the 2SE rule of thumb, calculate an approximate 95% confidence interval for the mean.

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

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