Making estimates (Edexcel GCSE Statistics): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
What is a representative sample in statistics?
What is a representative sample in statistics?
A small group reflecting the larger population accurately.
Why is understanding the median important in estimates?
Why is understanding the median important in estimates?
It splits data in half, showing the middle value for data spread.
What is the interquartile range?
What is the interquartile range?
Range of the middle 50% of data, between LQ and UQ.
Estimate from a sample where median is 116.7 for 41,500?
Estimate from a sample where median is 116.7 for 41,500?
50% of 41,500 = 20,750 people have BP above median.
What percentage of data falls below the 75th percentile?
What percentage of data falls below the 75th percentile?
75%, as the upper quartile marks the 75th percentile.
How do you calculate the estimated number for a statistic?
How do you calculate the estimated number for a statistic?
Multiply the percentage (as decimal) by total population.
Why are quartiles important in making estimates?
Why are quartiles important in making estimates?
They divide data into four equal parts, indicating distribution.
What is the main use of making estimates in real-world stats?
What is the main use of making estimates in real-world stats?
To guess values for the whole population from sample data.
What should you do after calculating an estimate?
What should you do after calculating an estimate?
Check if the answer makes sense in the given context.
What is a common mistake when working with quartiles?
What is a common mistake when working with quartiles?
Mixing up LQ, median, and UQ values.