The starter and exit quiz of the lesson “Weighted means”, from the unit “Comparisons of numerical summaries of data” (Year 10 Maths) by Oak National Academy.
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Oak National Academy
12 questions
The sum of the 5 data points in a data set is 200. The mean of this data set is ___.
8 people bought a mean of 3 loaves of bread. The total number of loaves of bread that were bought is ___ loaves.
12 people used a mean of 2.5 litres of water. The total amount of water that was used is ___ litres.
In group A, 3 people spent a mean of £4.In group B, 5 people spent a mean of £6.How much money, in total, was spent altogether across both groups A and B?
In total, how many people are there in this data set?
An estate agent records the number of rooms in each flat in a block of flats. The mean number of rooms is ___ correct to 2 decimal places.
Which of these statements defines a weighting factor when referring to a weighted mean?
In group A, 6 people have a mean score of 10.In group B, 4 people have a mean score of 12.The mean score of everyone in groups A and B combined is ___.
In group A, 2 earn a mean of £200 per day.In group B, 3 earn a mean of £180 per day.In group C, 5 earn a mean of £250 per day.The mean amount earned by all 10 people is £___.
Alex takes an art course. The two coursework tasks and final exam have weightings depending on how long the assignment is.The sum of all three values in the s\times f column is ___.
An interview consists of two tasks, each with a different importance.Which of these calculations finds the weighted mean for this data set?
A social media influencer reviews a meal at a restaurant and weights the criteria of price, taste, and presentation in the ratio 2 : 1 : 7.Their weighted rating (out of 10) for this meal is ___.
