Making estimates (Edexcel GCSE Statistics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which statistical measure is used to find the middle value?
Which statistical measure is used to find the middle value?
Median
What does the interquartile range (IQR) show?
What does the interquartile range (IQR) show?
Middle 50% spread
In a data set, what percentage falls below the lower quartile?
In a data set, what percentage falls below the lower quartile?
25%
How do you estimate the number of people below a certain blood pressure?
How do you estimate the number of people below a certain blood pressure?
Use quartile percentage
What is the main purpose of making estimates from samples?
What is the main purpose of making estimates from samples?
To infer about larger groups
What is key to accurately estimating from sample data?
What is key to accurately estimating from sample data?
Identifying the correct statistic
Which contains the middle 50% of data?
Which contains the middle 50% of data?
Interquartile range
If 25% of data is below 112.4, how many of 10,000 have lower blood pressure?
If 25% of data is below 112.4, how many of 10,000 have lower blood pressure?
2,500
Why is a representative sample important?
Why is a representative sample important?
To ensure accurate estimates
What should you do if estimates seem unreasonable?
What should you do if estimates seem unreasonable?
Check calculations carefully