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. ΣΧ- M =
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. ΣΧ- M =
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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 =
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Transcribed Image Text: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 =
Notations:
Sample mean = x and
Population mean = μ
n: is the sample size means number of observations.
: sum of all observations.
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