Statistics Quest

Practice

Practise until it sticks

Choose a topic, a skill or a difficulty. Calculation exercises have new versions with fresh numbers once you have solved them, so you can practise the method rather than memorise an answer.

← Back to the list · from Five-number summary and outliers

Practice, difficulty 2 of 3

What should happen to this value?

Not started

Each value below was flagged as an outlier. Decide what should happen to it.

An employee's commute recorded as 1 400 minutes (over 23 hours, one way)
A temperature of −999 in a sensor log where the manual says −999 means “no reading”
A motor claim of 480 000 SAR that the claims team has verified against the repair invoices
A 4.5-hour flight delay on a day with a reported dust storm
A lab result 10 times the usual range, from a sample that has not yet been re-tested
A grocery basket of 4 780 SAR at a branch whose largest basket is usually about 500 SAR