For the following table displays the heights (in inches) of students enrolled in an elementary school and the corresponding frequency; the sample mean for the table is 47.96 inches. Use the formulas for grouped data to approximate the sample standard deviation. Enter exact values in the table (integers or decimals - no rounding). Round the variance and the standard deviation to the nearest hundredth. Height (in inches) Class Midpoint X # students frequency, f 40-42 41 5 43-45 44 9 46-48 47 12 49-51 50 13
For the following table displays the heights (in inches) of students enrolled in an elementary school and the corresponding frequency; the sample mean for the table is 47.96 inches. Use the formulas for grouped data to approximate the sample standard deviation. Enter exact values in the table (integers or decimals - no rounding). Round the variance and the standard deviation to the nearest hundredth. Height (in inches) Class Midpoint X # students frequency, f 40-42 41 5 43-45 44 9 46-48 47 12 49-51 50 13
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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For the following table displays the heights (in inches) of students enrolled in an elementary school and the corresponding frequency; the sample mean for the table is 47.96 inches.
Use the formulas for grouped data to approximate the sample standard deviation. Enter exact values in the table (integers or decimals - no rounding). Round the variance and the standard deviation to the nearest hundredth.
|
Height (in inches) |
Class Midpoint X |
# students frequency, f |
|
|
| 40-42 | 41 | 5 | ||
| 43-45 | 44 | 9 | ||
| 46-48 | 47 | 12 | ||
| 49-51 | 50 | 13 | ||
| 52-54 | 53 | 11 |
=
sample variance =
sample st dev =
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