1. For the following scores, find:
(a) The median
(b) The mode
(c) The mean
If using a calculator, remember to clear any earlier numbers that have been entered.
(i) 39, 46, 19, 29, 33, 42, 32, 21, 19
(ii) 901, 999, 900, 998, 901, 904, 996, 991
(iii) 10, 14, 14, 14, 20
(iv) 30.43, 40.92, 10.37, 40.14, 60.64, 81.34, 5.39
2. 
A swimmer records the number of lengths he swims each day for a week. The number of lengths are: 30, 55, 62, 64, 60, 82, 30 (a) Calculate the mean, median and mode of these seven numbers. (b) Which of these averages would not be very representative of his week's swimming?

3. A woman has a fulltime job and gets paid by the hour. Her weekly pay for 2 months' work was:
$712.50, $811.80, $710.70, $913.10, $804.50, $712.00, $609.20, $879.60 and $695.50
(a) What was her mean weekly pay?
(b) What was her median pay?
4. The table below shows the number of hectares of apples planted in a reion over the past five years.
Year

Number of hectares of apples

1994

10 161

1995

10 210

1996

10 329

1997

10 243

1998

10 015

Find the mean number of acres of kiwifruit planted per year.
5. The results from a small class of students at a high school in French and Spanish are listed below.
a. Find the mean of each set of results.
French 
66

75

89

83

95

81

65

75

69

84

Spanish 
46

47

53

54

96

52

56

35

47

47

b. Comment on your results.
c. If 10 marks are added to each of the Spanish marks what is the new mean?
6 
a. The mean of fund raising money raised by 30 scouts is $65 each. What was the total raised by the scouts? b. The total amount of money taken in a pizza shop on a saturday is $4,400. If 550 pizzas are sold, what is the mean amount each pizza was sold for. c. A group of golfers each played a round of golf for a grand total of 384 shots. If the average round was 96, how many golfers played the round? 
7 
A student has an average of 78% in four exams with one exam to go. If he wants to average 80% in the five exams, how many marks will he need in the final exam? 