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Sajjad1994 can you please provide the official explanation for this?
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Official Explanation


The largest difference in the number of unemployed between any two groups was a difference of approximately ____________.

This problem requires some calculation, but the scale of the graph will only allow you to find an approximate value. First look for the largest gap, which will be between the line representing those with bachelor’s degrees and the line representing those without a high school diploma. The bachelor’s degree number holds reasonably steady at about 4,000, so the largest gap will be when the figure is highest for those without a high school diploma. That highest value is between 12,000 and 13,000, so the difference is greater than 8,000 but less than 9,000.

Answer: D

The greatest variation in the number of unemployed over this five month period occurred among ____________.

Look for the line with the greatest vertical change. The line representing those without a high school diploma takes a big dip in September and so has the greatest variation.

Answer: A

The pattern of variation in the number of unemployed among high school graduates with no college is most similar to that among____________.

The values will be different, but that’s not your concern. Look at the shape of the lines. You’re asked to find the line with a pattern of variation similar to that for high school graduates. The bachelor’s degree line has the most similar shape.

Answer: C
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varad98
Sajjad1994
Graph shows the number of unemployed (in thousands) over a five-month period, organized by level of education completed.

Attachment:
2.jpg

The largest difference in the number of unemployed between any two groups was a difference of approximately

The greatest variation in the number of unemployed over this five month period occurred among

Show SpoilerAdditional Question
The pattern of variation in the number of unemployed among high school graduates with no college is most similar to that among____________.

(A) Workers without a high school diploma
(B) Workers with some college education
(C) Workers with a bachelor’s degree or higher
(D) High school graduates with a college education
(E) No other group shows a similar pattern.

Answer: C
Question #1 based on the same graph is available here

Data Insights (DI) Butler 2023-24 [Question #28, Date: Oct-10-2023] [Click here for Details]

1) In month of July, there is unemployed personnel difference amongst workers without high school diploma and Bachelor and higher degree coming around 8500 figure. ( I had hard time in ruling out 8700 as answer, need help)

2) By observational skills, its very clear workers without high school degrees are experiencing highest variation.

I honestly hate how these questions trick you. I'm an Engineer so I probably have a disability for this, but if you want me to be precise about 8700 vs 8500 give a me a hell of a more precise scale. Otherwise, those two answers are just as good.
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Freddie92

varad98

Sajjad1994
Graph shows the number of unemployed (in thousands) over a five-month period, organized by level of education completed.

Attachment:
2.jpg

The largest difference in the number of unemployed between any two groups was a difference of approximately

The greatest variation in the number of unemployed over this five month period occurred among

Show SpoilerAdditional Question
The pattern of variation in the number of unemployed among high school graduates with no college is most similar to that among____________.

(A) Workers without a high school diploma
(B) Workers with some college education
(C) Workers with a bachelor’s degree or higher
(D) High school graduates with a college education
(E) No other group shows a similar pattern.

Answer: C
Question #1 based on the same graph is available here

Data Insights (DI) Butler 2023-24 [Question #28, Date: Oct-10-2023] [[url=https://gmatclub.com/forum/data-insights-di-butler-419150.html]Click here for Details]
1) In month of July, there is unemployed personnel difference amongst workers without high school diploma and Bachelor and higher degree coming around 8500 figure. ( I had hard time in ruling out 8700 as answer, need help)

2) By observational skills, its very clear workers without high school degrees are experiencing highest variation.
I honestly hate how these questions trick you. I'm an Engineer so I probably have a disability for this, but if you want me to be precise about 8700 vs 8500 give a me a hell of a more precise scale. Otherwise, those two answers are just as good.
­Agree with Freddie over here, the OE only gives us the  ramge but does not explain why 8700 is incorrect.­
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Quote:
The greatest variation in the number of unemployed over this five month period occurred among
I'm confused, why would the answer not be "workers with some college". Don't they have an a greater range of values and therefore a greater variation in the graph?
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I feel this is a bit unusual to ask about Variation. I have not seen many questions ask this and I just did a search in G&T, TPA, and MSR's and did not find a single official question that would have the term "Variation" used it in. So this probably is a bit non-standard question.

However, digging around, I see that Variation is supposed to be how different are the data sets from the average (not related to range), so the correct answer would be the data set that has many data points that differ from the average. The interesting part is that you don't calculate variation itself, it is just a concept. The calculation is done to find the variance.

I have only see the concept of variance mentioned in the official questions once - here: https://gmatclub.org/forum/the-graph-sh ... 13304.html.



albert_jokelin
Quote:
The greatest variation in the number of unemployed over this five month period occurred among
I'm confused, why would the answer not be "workers with some college". Don't they have an a greater range of values and therefore a greater variation in the graph?
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Again a poor quality by Sajjad1994
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Thanks for the clarification.

I could be wrong but if we eyeball it, the variation (as you've explained) comes out to be similar (although the variance could differ).

Say a question like this does come for the test, how should I approach it within a reasonable timeframe?
bb
I feel this is a bit unusual to ask about Variation. I have not seen many questions ask this and I just did a search in G&T, TPA, and MSR's and did not find a single official question that would have the term "Variation" used it in. So this probably is a bit non-standard question.

However, digging around, I see that Variation is supposed to be how different are the data sets from the average (not related to range), so the correct answer would be the data set that has many data points that differ from the average. The interesting part is that you don't calculate variation itself, it is just a concept. The calculation is done to find the variance.

I have only see the concept of variance mentioned in the official questions once - here: https://gmatclub.org/forum/the-graph-sh ... 13304.html.



albert_jokelin
Quote:
The greatest variation in the number of unemployed over this five month period occurred among
I'm confused, why would the answer not be "workers with some college". Don't they have an a greater range of values and therefore a greater variation in the graph?