Mettl Data Interpretation Skills 5 — Questions and Answers
Question 1: A data set shows five stores' monthly costs: $12K, $15K, $9K, $18K, $11K. An analyst removes the highest-cost store from the analysis. What is the new average?
- $11,250
- $11,750 (Correct answer)
- $11,500
- $11,000
Correct answer: $11,750
Removing $18K: remaining stores sum = 12+15+9+11 = 47; 47/4 = $11,750.
Question 2: A line graph shows a company's stock price over 6 months. The price was $50 in Month 1 and $65 in Month 6, with no clear straight-line trend between. Which statement is most accurate?
- The stock grew at a constant rate
- The net change was +$15 but intra-period volatility is unknown from this info (Correct answer)
- The stock never dipped below $50
- The average monthly price was $57.50
Correct answer: The net change was +$15 but intra-period volatility is unknown from this info
Only endpoint values are stated; intra-period movements cannot be determined from two data points alone.
Question 3: A table compares two investment options: Option A returns 8% annually on $10,000; Option B returns 6% annually on $15,000. After one year, which yields more absolute return?
- Option A with $800
- Option B with $900 (Correct answer)
- They yield the same
- Cannot be determined
Correct answer: Option B with $900
Option A: 8%×$10,000=$800; Option B: 6%×$15,000=$900, so Option B yields more.
Question 4: A chart shows that 3 out of every 8 employees work remotely. In a company of 480 employees, how many work on-site?
- 180
- 300 (Correct answer)
- 240
- 160
Correct answer: 300
Remote workers = (3/8)×480=180; on-site = 480−180 = 300.
Question 5: A grouped bar chart shows male and female scores on two tests. On Test 1, males averaged 72 and females averaged 78. On Test 2, males averaged 85 and females averaged 80. Which conclusion is supported by this data?
- Females outperform males overall
- Males improved more between tests (Correct answer)
- Females consistently outperform males
- Test 2 was easier for everyone
Correct answer: Males improved more between tests
Males improved 13 points (72→85) while females improved only 2 points (78→80), so males improved more.
Question 6: A cumulative frequency table shows that 80 out of 200 respondents prefer Brand X. A later survey of 500 people shows 175 prefer Brand X. Has the preference rate increased, decreased, or stayed the same?
- Increased from 35% to 40%
- Decreased from 40% to 35% (Correct answer)
- Remained the same at 35%
- Increased from 30% to 35%
Correct answer: Decreased from 40% to 35%
First survey: 80/200=40%; second survey: 175/500=35%; the preference rate decreased.
Question 7: An analyst says 'sales doubled last quarter.' A bar chart shows Q3=$1.2M and Q4=$2.1M. Is the analyst's claim accurate?
- Yes, because Q4 is higher than Q3
- No, sales increased by 75%, not 100% (Correct answer)
- Yes, $2.1M is approximately double $1.2M
- No, sales actually tripled
Correct answer: No, sales increased by 75%, not 100%
Doubling would require Q4=$2.4M; actual growth = (2.1−1.2)/1.2 = 75%, not 100%.
Mettl Data Interpretation Skills 5
A data set shows five stores' monthly costs: $12K, $15K, $9K, $18K, $11K.
An analyst removes the highest-cost store from the analysis.
What is the new average?