Find the range. (b) Verify that Σx = 108 and Σx2 = 2,480. Σx  =    Σx2  =    (c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s2 and sample standard deviation s.

MATLAB: An Introduction with Applications
6th Edition
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Author:Amos Gilat
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Chapter1: Starting With Matlab
Section: Chapter Questions
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Given the sample data.

x: 21 17 15 30 25
(a) Find the range.


(b) Verify that Σx = 108 and Σx2 = 2,480.
Σx  =   
Σx2  =   


(c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s2 and sample standard deviation s. (Round your answers to two decimal places.)
s2  =   
s  =   


(d) Use the defining formulas to compute the sample variance s2 and sample standard deviation s. (Round your answers to two decimal places.)
s2  =   
s  =   


(e) Suppose the given data comprise the entire population of all x values. Compute the population variance ?2 and population standard deviation ?. (Round your answers to two decimal places.)
?2  =   
?  =   
Given the sample data.
(a) Find the range.
(b) Verify that Ex = 108 and Ex² = 2,480.
Ex =
Σχ2 =
x: 21 17 15 30 25
(c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s² and sample standard deviation s. (Round your answers to two decimal places.)
s² =
S =
(d) Use the defining formulas to compute the sample variance s² and sample standard deviation s. (Round your answers to two decimal places.)
s² =
S =
(e) Suppose the given data comprise the entire population of all x values. Compute the population variance o2 and population standard deviation σ. (Round your answers to two decimal places.)
o² =
0
Transcribed Image Text:Given the sample data. (a) Find the range. (b) Verify that Ex = 108 and Ex² = 2,480. Ex = Σχ2 = x: 21 17 15 30 25 (c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s² and sample standard deviation s. (Round your answers to two decimal places.) s² = S = (d) Use the defining formulas to compute the sample variance s² and sample standard deviation s. (Round your answers to two decimal places.) s² = S = (e) Suppose the given data comprise the entire population of all x values. Compute the population variance o2 and population standard deviation σ. (Round your answers to two decimal places.) o² = 0
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