A ng.cengage.comO Mail - We* Mind Tap - Cengage Learnings https://mytnstate-my.sharepoint.com/personal/ijackson..arch MethodsCENGAGE MINDTAPProblem Set: Chapter 03 Central Tendency4. Calculating the mean when multiplying or dividing by a constantA school district is deciding whether or not to adopt a new reading curriculum. Three classrooms are randomly selected as test sites for the curriculum.To obtain a measure of student improvement, students in the three classrooms are tested on their vocabulary before and after the curriculum isimplemented.The vocabulary test Kas 25 possible points. The post-implementation scores for the students in the first classroom are shown in the following table:222116181523172420192211Calculate the sample size, n; the total sum, EX; and the sample mean, M.ΣΧM =The school district decides it will be easier to understand the scores if they are converted to a 100-point scale. This requires that each score bemultiplied by 4Calculate the new n, EX, and M.n =ΣΧ-M =MacBook AirDIIFBF9F10F3F4F5F7%24&8WECO

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Description: A ng.cengage.comO Mail - We* Mind Tap - Cengage Learnings https://mytnstate-my.sharepoint.com/personal/ijackson..arch MethodsCENGAGE MINDTAPProblem Set: Chapter 03 Central Tendency4. Calculating the mean when multiplying or dividing by a constantA s

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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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A ng.cengage.com
O Mail - We
* Mind Tap - Cengage Learning
s https://mytnstate-my.sharepoint.com/personal/ijackson..
arch Methods
CENGAGE MINDTAP
Problem Set: Chapter 03 Central Tendency
4. Calculating the mean when multiplying or dividing by a constant
A school district is deciding whether or not to adopt a new reading curriculum. Three classrooms are randomly selected as test sites for the curriculum.
To obtain a measure of student improvement, students in the three classrooms are tested on their vocabulary before and after the curriculum is
implemented.
The vocabulary test Kas 25 possible points. The post-implementation scores for the students in the first classroom are shown in the following table:
22
21
16
18
15
23
17
24
20
19
22
11
Calculate the sample size, n; the total sum, EX; and the sample mean, M.
ΣΧ
M =
The school district decides it will be easier to understand the scores if they are converted to a 100-point scale. This requires that each score be
multiplied by 4
Calculate the new n, EX, and M.
n =
ΣΧ-
M =
MacBook Air
DII
FB
F9
F10
F3
F4
F5
F7
%24
&
8
W
E
CO

Expert Solution

Step 1

Mean: The mean is the sum of observations divided by number of observations. that is,

Formula for mean is,

Mean = $\frac{\sum_{} x_{i}}{n}$

Notations:
Sample mean = x and
Population mean = μ

n: is the sample size means number of observations.

$\sum_{}$ : sum of all observations.

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