Data Collection and Representation
Math ⇒ Statistics and Probability
Data Collection and Representation starts at 6 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Data Collection and Representation.
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See sample questions for grade 10
Describe one advantage and one disadvantage of using a questionnaire for data collection.
Explain the difference between a population and a sample in statistics.
Explain the difference between discrete and continuous data with an example for each.
Explain why it is important to avoid bias in data collection.
A class of 30 students was surveyed about their favorite fruit. The results are: Apple - 10, Banana - 8, Orange - 7, Mango - 5. What is the relative frequency of students who prefer Banana?
A data set contains the following values: 5, 7, 8, 10, 12. What is the range of the data?
A data set has the following values: 3, 5, 7, 9, 11. If you add 2 to each value, what will be the new mean?
A frequency table shows the number of books read by students in a month: 0 books - 2 students, 1 book - 5 students, 2 books - 8 students, 3 books - 10 students, 4 books - 5 students. What is the total number of students surveyed?
Which of the following best describes a census?
(1) Collecting data from a sample
(2) Collecting data from the entire population
(3) Collecting data from a subgroup
(4) Collecting data from a random selection
Which of the following is a continuous variable?
(1) Number of students in a class
(2) Height of students
(3) Number of cars in a parking lot
(4) Number of books on a shelf
Which of the following is a disadvantage of using secondary data?
(1) It is time-consuming to collect
(2) It may not be relevant to your study
(3) It is always accurate
(4) It is always up-to-date
Which of the following is a method to reduce sampling error?
(1) Increase sample size
(2) Use biased questions
(3) Ignore outliers
(4) Use only secondary data
Fill in the blank: A __________ is a graphical representation of the distribution of numerical data using bars of different heights.
Fill in the blank: In a bar graph, the __________ of the bars represents the frequency of each category.
Fill in the blank: In a stem-and-leaf plot, the __________ represents the leading digit(s) of the data values.
Fill in the blank: The __________ is a value that divides a data set into two equal halves.
True or False: A bar graph can be used to represent both discrete and continuous data.
True or False: A histogram can be used to display categorical data.
True or False: A line graph is best used to show changes over time.
True or False: Data collected through experiments is always more reliable than data collected through surveys.
