Cognizant Cognizant Data Analysis and Interpretation 1 — Questions and Answers
Question 1: A table shows sales data for 4 quarters: Q1=$12,000, Q2=$15,000, Q3=$18,000, Q4=$21,000. What is the average quarterly sales?
- $15,500
- $16,000
- $16,500 (Correct answer)
- $17,000
Correct answer: $16,500
The average is (12,000+15,000+18,000+21,000)/4 = 66,000/4 = $16,500.
Question 2: In a dataset of 10 values, if the median is 45 and the mean is 50, what does this indicate about the distribution?
- It is symmetric
- It is positively skewed (Correct answer)
- It is negatively skewed
- It is bimodal
Correct answer: It is positively skewed
When the mean exceeds the median, the distribution is positively (right) skewed, pulled up by high outliers.
Question 3: A pie chart shows Department A has 36% of employees, Department B has 24%, Department C has 28%, and Department D has the rest. If total employees = 500, how many are in Department D?
- 50
- 60 (Correct answer)
- 70
- 80
Correct answer: 60
Department D = 100% − 36% − 24% − 28% = 12%; 12% of 500 = 60 employees.
Question 4: A bar graph shows product returns: Jan=40, Feb=55, Mar=35, Apr=70. What is the percentage increase from Mar to Apr?
- 50%
- 75%
- 100% (Correct answer)
- 200%
Correct answer: 100%
Percentage increase = (70−35)/35 × 100 = 35/35 × 100 = 100%.
Question 5: Which measure of central tendency is most affected by extreme outlier values in a dataset?
- Mode
- Median
- Mean (Correct answer)
- Range
Correct answer: Mean
The mean is most sensitive to outliers because it uses every data point in its calculation.
Question 6: A line graph shows website traffic: Mon=200, Tue=250, Wed=300, Thu=275, Fri=325. What is the overall trend?
- Decreasing
- Constant
- Increasing with a mid-week dip (Correct answer)
- No pattern
Correct answer: Increasing with a mid-week dip
Traffic generally increases across the week but dips on Thursday before rising again on Friday.
Cognizant Cognizant Data Analysis and Interpretation 1
A table shows sales data for 4 quarters: Q1=$12,000, Q2=$15,000, Q3=$18,000, Q4=$21,000.
What is the average quarterly sales?