Making estimates (AQA GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What is the purpose of making estimates in statistics?
What is the purpose of making estimates in statistics?
To predict population characteristics from a sample.
How do quartiles divide a dataset?
How do quartiles divide a dataset?
Into four equal parts, each with 25% of the data.
What is the formula for estimating population size?
What is the formula for estimating population size?
Estimated number = Sample percentage (as decimal) × Total.
If 25% of a sample shows a characteristic, how to estimate?
If 25% of a sample shows a characteristic, how to estimate?
Multiply 0.25 by the total population size.
What does the median represent in a dataset?
What does the median represent in a dataset?
The middle value, with 50% below and 50% above.
How to determine patients above the median value?
How to determine patients above the median value?
Count patients with values greater than the median.
What is the 25th percentile in a weight table?
What is the 25th percentile in a weight table?
The weight below which 25% of the sample falls.
How to estimate values between two percentiles?
How to estimate values between two percentiles?
Interpolate between the two percentile values.
What common mistake to avoid in calculations?
What common mistake to avoid in calculations?
Confusing percentages with decimals in estimations.
Why check if estimated numbers make sense?
Why check if estimated numbers make sense?
To ensure logical consistency with population size.