QUIZ
Q1- When Aimee walked through a shopping mall,
she recorded the number of customers in each
shop. The data is displayed in a dot plot.
a How many shops did Aimee collect data
from?
b How many shops had 3 customers?
What percentage of shops had:
- i) 5 customers
- ii) at least 7 customers?
Q2- 50 boxes of sweets were selected, and the sweets in each box
were counted.
a Construct a column graph to display the data.
b Describe the distribution of the data.
Q3- Â The following marks were scored for a test out of 50 marks:
47 32 32 29 36 39 40 46 43 39 44 18 38 45 35 46 7 44 27 48
a Construct a stem plot to display the data.
b How many students scored 40 or more marks?
c What percentage of the students scored less than 30 marks?
d A score of 25 or more is required to pass the test. What percentage of the students passed?
e Describe the distribution of the data.
Q4- A frequency table for the height h of the players in a
basketball squad, is given alongside.
a Explain why height is a continuous variable.
b Construct a frequency histogram for the data.
c What is the modal class? Explain what this means.
d Describe the distribution of the data.
Q5- 5 Packets of chocolate almonds were opened and their contents counted. The table shows the results.
Find the mean and median of the data.
Q6- On an 8 day camping holiday, Lachlan drove an average of 214 km per day. In total, how far did Lachlan drive while on holiday?
Q7- Sixty people were asked: “How many times have you been to the cinema in the last twelve months?”. The results are given in the table alongside.
a Extend the table to include an interval midpoint and a product column.
b Estimate the mean of the data.
Q8- The table alongside shows the heights of dancers in a ballet class.
a Construct a cumulative frequency table for the data.
b How many dancers are in the class?
c Represent the data on a cumulative frequency graph.
d Use your graph to estimate the number of dancers who are:
i shorter than 155 cm     ii taller than 145 cm.
Q9- The stem plot shows the heights of bean seedlings two weeks after the seeds germinated. Find the:
a minimum value                                                                          b maximum value c median                                                                                        d lower quartile    e upper quartile                                                                             f range                    g interquartile range.