When a statistical claim is presented, which of the following is the most important initial step in evaluating its validity?
Question 2
A study concludes that 'children who read more frequently have a larger vocabulary'. Which of the following best describes the relationship between reading frequency and vocabulary size?
Question 3
A charity reports that '$90\%$ of donations go directly to beneficiaries'. To properly evaluate this claim, which question is most crucial to ask?
Question 4
A graph shows a sharp increase in sales after a new marketing campaign. However, the y-axis (sales) starts at $90\%$ of the maximum sales value. What is the likely effect of this graphical representation?
Question 5
Which of the following scenarios best exemplifies a 'confounding variable' in a study investigating the link between coffee consumption and heart disease?
