📊 Data Analysis and Probability
This quiz covers essential data analysis and probability concepts from the Ontario Grade 7 Mathematics curriculum. You'll explore how to distinguish between populations and samples, calculate measures of central tendency, interpret data displays like circle graphs, and understand independent and dependent events. Master these skills to analyze real-world data and make informed predictions. **What you'll learn:** - Distinguish between populations and samples in data collection - Calculate and interpret mean, median, and mode - Read and interpret circle graphs and other data displays - Determine probabilities of independent and dependent events - Apply statistical reasoning to solve practical problems
Questions in this quiz
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- Question 1
A researcher wants to find out the average study time of all Grade 7 students in Ontario. Since surveying every student is not practical, the researcher surveys 500 randomly selected Grade 7 students. What is the 500 students an example of?
- Question 2
The following data set represents the number of goals scored by a soccer player in 8 games: 2, 3, 1, 5, 3, 2, 3, 4. What is the median number of goals?
- Question 3
The mode is the value that appears most frequently in a data set.
- Question 4
The mean of the data set {10, 15, 20, 25, 30} is:
- Question 5
A circle graph shows how students at a school prefer to travel to school. The categories are: bus (40%), car (35%), walk (20%), and bike (5%). If the circle has a total of 360°, how many degrees should the bus section occupy?
- Question 6
In a data set of test scores {72, 85, 90, 78, 85, 88}, which value is the mode?
- Question 7
A population is a smaller group selected from a larger group to represent and estimate characteristics of the whole group.
- Question 8
If you roll a fair six-sided die, what is the probability of rolling a 3 or a 5?
- Question 9
A bag contains 5 red balls and 3 blue balls. If you draw one ball without looking, what is the probability of drawing a red ball?
- Question 10
You flip a coin and roll a die. These are examples of:
- Question 11
If you draw a card from a deck, replace it, and then draw another card, the two draws are dependent events.
- Question 12
A data set has the values: 4, 8, 12, 16, 20. What is the mean of this data set?
- Question 13
A circle graph shows the favorite ice cream flavors of 200 students. Vanilla represents 25% of students. How many students prefer vanilla?
- Question 14
You have a spinner with 4 equal sections: red, blue, green, and yellow. You spin it twice. What is the probability of spinning red both times?
- Question 15
In a circle graph, the total of all sections must equal 360°.
- Question 16
In a drawing without replacement, you pull a marble from a bag of 10 marbles and do not put it back. Then you pull another marble. These events are:
- Question 17
A class collects data on how many hours students spend exercising per week. The results are: 3, 5, 4, 6, 5, 7, 5, 4. What is the mode?