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 Observational studies and experiments

Application, difficulty 2 of 3

Change in each arm

Not started

Using the bp_trial data, keep only participants who completed the trial (week8_sbp is not missing). For each one compute change = week8_sbp − baseline_sbp. What is the mean change in each arm? Give both to 2 decimal places (a fall is negative).

Data: bp_trial · Open in the lab to explore and calculate.