alleryEvery observation is increased by 3. How does the mean change?
AIt rises by 3
BIt stays fixed
CIt triples
DIt rises by 1
Answer & Solution
Correct answer: A. It rises by 3
Adding 3 to each of n observations raises their total by 3n and the mean by 3.
Keep practising Statistics and Probability
Browse all Statistics and Probability questions for ICSE Class 10, or explore more Mathematics topics.
Related questions
Match each central tendency measure with its best application:Match each cumulative frequency curve (Ogive) feature with its property:Match each statistical relationship with its rule:Match each central tendency measure with its grouped data formula:A class has midpoint 15 and width 10. Which continuous interval fits?Values 1,2,3 occur 2,5,2 times respectively. What is the median?A data set has unique mode 7. Adding 4 to every value gives which mode?Every measurement is increased by 5. How does its interquartile range change?