Download Chapter 10 - Data - Homework sheet 3

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MAT07SPHS10039_Statistics_3.3d] [30/1/012/14:22:50] [1–2]
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Homework sheet
Statistics 3
Name:
Due date:
Parent’s signature:
Part A
Part B: Review
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1 The heights (in cm) of a group of basketball
Part B
/8
Part C
/8
Part D
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Total
players are:
179 185 204 183 192 188 170 185 195 199
/32
a Find the median.
Part A: Mental maths
l
Calculators are not allowed.
1 Draw a rhombus and mark its axes of symmetry.
b Find the range.
c Which height is an outlier?
d Find the mean.
e Find the mode.
2 Find 25% of $76.
f Show these heights on an ordered stem-andleaf plot.
3 Evaluate 7 2 50.
4 True or false? For any two numbers a and b,
a – b ¼ b – a.
5 Solve 2u – 20 ¼ 14.
g What fraction of players are over 190 cm?
6 Evaluate 193.2 1000.
7 Find the area of this triangle.
h If the 192 cm player was replaced by a
182 cm player, would the mean increase or
3 cm
decrease?
8.2 cm
© Cengage Learning Australia Pty Ltd 2011
MAT07SPHS10039
Statistics and Probability: Data representation and interpretation
www.nelsonnet.com.au
[Satish][NelsonNet Worksheet][D:/Thomson_Learning_Projects/NelsonNet_Worksheets_SB7_1080060/z_production/z_3B2_3D_files/Maths worksheet MS x 43/Student resources/NCM_Batch1/Homework_sheets/
MAT07SPHS10039_Statistics_3.3d] [30/1/012/14:22:50] [1–2]
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Part C: Practice
Part D: Numeracy and literacy
l
Analysing dot plots and stem-and-leaf plots
l
Comparing data sets
1 Name the statistical measure that:
a shows the spread of scores in a data set
1 This dot plot shows the number of rainy days per
b can be more than one value
week in Westvale over winter.
2 (2 marks) Name the two statistical measures
that are most affected by outliers.
0 1 2 3 4 5 6 7
Rainy days per week–Winter
3 This stem-and-leaf plot shows the number of
properties sold each month by a real estate
agency.
a Find the mode.
Stem Leaf
1
2
3
b How many weeks had only one rainy
day?
0 1 4 5 9
3 3 3 7
0 0
c Find the range.
d Calculate the mean correct to one decimal
place.
a Find the mode.
b Find the mean. Give your answer to one
2 This dot plot shows the number of rainy days per
week in Westvale over summer.
decimal place.
c Find the median.
d Find the range.
0 1 2 3 4 5 6 7
Rainy days per week–Summer
a What is the outlier?
b Find the median.
c Name one difference between the data for
summer and winter.
d Which season has more consistent numbers
of rainy days per week?
© Cengage Learning Australia Pty Ltd 2011
MAT07SPHS10039
Statistics and Probability: Data representation and interpretation
www.nelsonnet.com.au