Variance plays a major role in interpreting data in statistics. Variance is used to find the variation of the data from the mean. Interestingly, the variance exaggerates the spread, and thus standard deviation was introduced. But to calculate Standard Deviation, GMAT test takers should know how to find variance.
Step by Step tutorial on calculating variance
Average Question is an important topic in GMAT problem solving and data sufficiency. Let us start with the Basics.When we have groups of numbers whose individual averages are known then Weighted Averages will help us find the average of the entire group.
The Tutorial includes tips to solve Average Age questions and other weighted average questions.
Set A consists of integers -9, 8, 3, 10, and J; Set B consists of integers -2, 5, 0, 7, -6, and T. If R is the median of Set A and W is the mode of set B, and R^W is a factor of 34, what is the value of T if J is negative?
(A) -2
(B) 0
(C) 1
(D) 2
(E) 5
Find the Solution
Even if you fear statistics by its reputation, it is one of the easiest sections in the GMAT because a standard set of questions is asked and anyone who understands the fundamentals that I shall describe will be able to ace the questions. Learn the GMAT Statistics Fundamentals.
What is the mode of the set if the average of the set {15, 30, 60, k, 20, 40} is equal to 37.5?
A. 20
B. 25
C. 35
D. 40
E. 60
Answer
The first step is to determine the value of k. We determine the value by taking the sum of the set elements, dividing by 6 and setting them equal to 37.5.
(165 + k)/6 = 37.5.
165 + k = 225.
k = 60.
Since 60 is the most frequently appearing number in the set, 60 must be mode
Essential GMAT Reading Comprehension Guide (2023 Edition)
Collecting and Interpreting Facts: GMAT Reading Comprehension
Effective Note-taking for GMAT Reading Comprehension
5 Questions to Speed up Summary Creation
Mastering GMAT Reading Comprehension: 3 Best Practices
How to Remember Information
How to improve comprehension by Questioning the Author
How to Read Faster
How to Answer GMAT Reading Comprehension Title question
How to Answer GMAT Reading Comprehension Main Idea Question
How to Answer GMAT Reading comprehension inference question
How to Answer GMAT Reading Comprehension Purpose Question
How to Answer GMAT Reading Comprehension Detail Question
How to Answer the GMAT organization of passage Question
How to Improve GMAT Reading Comprehension Score?
Passage #1: Protein-Rich Diet Passage #2: Pregnant Women and Stress Management
Passage #3: F Losing Momentum
Passage #4: Conservatives and Automation
Passage #5: Collaboration, Team size and Performance
Passage #6: Effective Altruism
Passage #7: Loneliness Epidemic
Passage #8: Space Exploration
Passage #9: Lab-Grown Meat
Passage #10: Minimum Wage in the US
Passage #11: AI and Creativity
Passage #12: Bias Against Healthcare in Developing Economies
Passage #13: Legacy Admissions
Passage #14: Plastic Ban and alternatives
Passage #15: Underestimating Homo Sapiens
Passage #16: Conspiracy Theories
Passage #17: Relative Poverty
Passage #18: Why Paintings are expensive
Passage #19: US Obesity Epidemics
Passage #20: The Future of Advertising
Passage #21: Breaking Large Companies
Passage #22: Helicopter Parenting
Passage #23: Future of Democracy
Passage #24: Technology and Global Citizenship
Passage #25: Morality and Investment
Answers: 157 to 294
Pages: 295
Questions: 100+
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Mastering GMAT Critical Reasoning (2023 Edition)
1) Introduction
2) 6 Step Strategy to solve GMAT Critical Reasoning Questions
3) How to overcome flawed thinking in GMAT Critical Reasoning?
4) 4 GMAT Critical Reasoning Fallacies
5) Generalization in GMAT Critical Reasoning
6) Inconsistencies in Arguments
7) Eliminate Out of Scope answer choices using Necessary and Sufficient Conditions
8) Ad Hominem in GMAT Critical Reasoning
9) Slippery Slope in GMAT Critical Reasoning
10) Affirming the Consequent – GMAT Critical Reasoning
11) How to Paraphrase GMAT Critical Reasoning Question
12) How to Answer Assumption Question Type
13) How to Answer Conclusion Question Type
14) How to Answer Inference Question Type
15) How to Answer Strengthen Question Type
16) How to Answer Weaken Question Type
17) How to Answer bold-faced and Summary Question Types
18) How to Answer Parallel Reasoning Questions
19) How to Answer the Fill in the Blanks Question
Question Bank
Question 1: 5G Technology (Inference)
Question 2: Water Purifier vs. Minerals (Fill in the Blanks)
Question 3: Opioid Abuse (Strengthens)
Question 4: Abe and Japan’s Economy (Inference)
Question 5: Indians and Pulse Import (Weakens)
Question 6: Retail Chains in Latin America (Assumption)
Question 7: American Tax Rates – Republican vs. Democrats (Inference)
Question 8: AI – China vs the US (Weakens)
Question 9: Phone Snooping (Strengthens)
Question 10: Traditional Lawns (Assumption)
Question 11: Appraisal-Tendency Framework (Inference)
Question 12: Meta-Analysis of Diet Trials (Weakens)
Question 13: Biases in AI (Strengthens)
Question 14: Stock Price and Effectiveness of Leadership (Inference)
Question 15: US Border Wall (Weakens)
Question 16: Driverless Car and Pollution (Assumption)
Question 17: Climate Change (Inference)
Question 18: Rent a Furniture (Weakens)
Question 19: Marathon Performance and Customized Shoes (Weakens)
Question 20: Guaranteed Basic Income (Assumption)
Question 21: Brexit (Infer)
Question 22: AB vs Traditional Hotels (Assumption)
Question 23: Tax Incentive and Job Creation (Weakens)
Question 24: Obesity and Sleeve Gastrectomy (Inference)
Question 25: Recruiting Executives (Weaken)
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