Question 2

A sample of red-eyed tree frogs is taken from an area surrounding a pond in central Queensland. The lengths of the frogs in millimetres are:

33

35

45

50

55

58

32

56

60

32

Question 2 - multiple choice question

The sample mean for the length of frogs is:

45.6 mm 48.5 mm 50 mm

Question 3

The mass of 22 people is recorded in kilograms below.

77	85.5	63	80.5	79.5	94	66	69	65	58	69.5
74	74	68	80	66	54.5	64	84	73	89	94

Question 3a to d - multiple choice question

a	The mean mass of the population is:
	71.25 kg	73.93 kg	81.96 kg
b	The mean of the ten smallest masses is:
	64.3 kg	65.5 kg	71.25 kg
c	The mean of the ten largest masses is:
	81.96 kg	82.25 kg	83.75 kg
d	If a sample of ten was selected from this population, the largest variation in the mean would be from:
	54.5 kg to 94 kg	64.3 kg to 83.75 kg	71.25 kg to 94 kg