Calculating Mean of Group Data using Step Deviation Method

Interactive Video
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Mathematics, Social Studies
•
10th Grade - University
•
Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary focus of the step deviation method discussed in the video?
Identifying the range of data
Calculating the median of group data
Finding the mode of a dataset
Determining the mean of group data
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in solving the problem of finding the mean age of 100 community members?
Choosing an assumed mean
Calculating the deviations
Listing down the class intervals and finding mid-values
Calculating the total frequency
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the mid-value (xi) of a class interval calculated?
By dividing the upper limit by the lower limit
By multiplying the lower limit by the upper limit
By adding the lower and upper limits and dividing by 2
By subtracting the lower limit from the upper limit
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of calculating ui in the step deviation method?
To simplify calculations by normalizing deviations
To determine the class size
To calculate the median
To find the total frequency
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the assumed mean (a) used in the problem, and why was it chosen?
30, because it is the average of all mid-values
45, because it is the largest mid-value
35, because it is the central value with the highest frequency
25, because it is the smallest mid-value
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula used to find the mean in the step deviation method?
x̄ = a + h * ū
x̄ = a * h + ū
x̄ = a / h - ū
x̄ = a - h * ū
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the final mean age of the community members calculated in the video?
31 years
35 years
33 years
29 years
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