alleryWhy is a mean from class midpoints usually an estimate?
AEvery class contains one value
BWithin-class values are unknown
CFrequencies are ignored
DAll classes have equal width
Answer & Solution
Correct answer: B. Within-class values are unknown
Grouped averaging represents unknown individual values by their class midpoint.
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?