Problems with collected data (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
Why is checking and cleaning data before analysis essential?
Why is checking and cleaning data before analysis essential?
Ensures accuracy
What is an outlier in a dataset?
What is an outlier in a dataset?
A value that doesn't fit pattern
Which is a sign of a possible recording error?
Which is a sign of a possible recording error?
Decimal point in wrong place
What should you do if an outlier is due to an error?
What should you do if an outlier is due to an error?
Remove or correct it
Why consider collection method reliability?
Why consider collection method reliability?
It affects data accuracy
What is the first step after collecting data?
What is the first step after collecting data?
Check for problems
How can inconsistent measurement methods affect reliability?
How can inconsistent measurement methods affect reliability?
Increase errors
What should you do about missing data?
What should you do about missing data?
Estimate or collect data
Why keep a record of data cleaning decisions?
Why keep a record of data cleaning decisions?
To allow others to understand process
What is a key reason to investigate outliers?
What is a key reason to investigate outliers?
They can be genuine results