Question

A study shows the average number of children in a family is 2.3


a) explain how you can tell which average was used?
b) would you answer to (a) be the same if the study had repeated and found the average to be 3 children?

Sarah keeps a record of hte number of shopping bags that she is given when she does her weekly shopping. the data she collected over hte past 10 weeks. 5,8,9,7,6,6,10,8,9,9

a)explain why the mean is not useful in the circumstance.
b) which value might the environmental group use, if they believe that supermarkets causes pollution by giving out too many bags

Answer 1

c) which value might be used by a shopper who htinks that the supermarket tries to cut cost by giving less shopping bags to customers?

During a week in December the number of children absent from school in 7H was recorded as in the following: 0,2,1,0,5
a)which of these averages gives the best impression of the class?
b) which of these averages gives the worst impression of the class?

Answer 2

there are several sets of five positive whole numbers with the following properties. mean=4 median =3 mode=3

a) find two possible sets
b) if i also tell you that the range is 10, can you identify my numbers?