The box plot shows the distribution of the salaries for the workers at Bexbridge Biscuits - OCR - GCSE Maths - Question 16 - 2018 - Paper 1

The interquartile range (IQR) is calculated as the difference between the upper quartile and the lower quartile. From the box plot:

• Lower Quartile (Q1) = £28,000
• Upper Quartile (Q3) = £50,000

Thus, the IQR is calculated as follows:

$IQR = Q3 - Q1 = 50,000 - 28,000 = £22,000$

To draw the box plot for Camford Cookies, note the following values:

• Lower Quartile (Q1) = £28,000
• Median = £37,000
• Upper Quartile (Q3) = £50,000
• Maximum = £85,000
• Minimum = £17,000 (which is 20% of the highest salary, £85,000)

The box plot will reflect these values accordingly.

1. The median salary at Bexbridge Biscuits (£37,000) is the same as the median salary at Camford Cookies.

2. The interquartile range for Bexbridge Biscuits (£22,000) is the same as that for Camford Cookies, indicating that the spread of the middle 50% of salaries is similar in both distributions.