These corrected statistics exercises are designed to help students in 9th grade and 10th grade practice and master the fundamental concepts of statistics, such as the arithmetic mean and frequency distribution.
For example, one exercise asks students to calculate the total number of books borrowed in a library over a given week, as well as to determine the daily average of these loans. This exercise helps students become familiar with the concept of the arithmetic mean, a fundamental skill in the 9th and 10th grade math curriculum in the United States. The arithmetic mean is defined as the sum of the values in a data set divided by the total number of values. Using the data provided in the table, students must perform the necessary calculations to obtain the daily average of books borrowed.
Another exercise focuses on the distribution of test scores among 26 students. Students must determine the number of students who received a score within a certain range, as well as the total number of students who received a score below 12. This exercise aims to strengthen students' ability to read and interpret frequency tables, as well as to understand the concepts of distribution and interval. Frequency is a statistical measure that indicates how often a particular value appears in a data set. By analyzing the data in the table, students learn to calculate the frequency of values and draw conclusions about the distribution of scores.
Finally, an exercise asks students to determine the frequency of employees in a company based on their age. Students must identify the age group of employees between 25 and 29 years old and calculate their frequency in relation to the total number of employees. This exercise aims to familiarize students with the concepts of distribution and frequency using real-world data. It also helps improve their ability to extract and analyze relevant information from data tables, essential skills in the 9th and 10th grade curriculum.
These exercises provide students with opportunities to practice crucial statistical skills while reinforcing their theoretical and practical understanding of the concepts covered in the U.S. school curriculum.
3 exercisesExercise example N°4401 :
In a library open from Tuesday to Saturday inclusive, we counted, day by day, the number of books lent during a week and we obtained the results in the following table:
| Tuesday | 73 |
|---|---|
| Wednesday | 16 |
| Thursday | 4 |
| Friday | 73 |
| Saturday | 79 |
statistics 9th Grade 10th Grade average
The purpose of this corrected statistics exercise is to practice calculating an arithmetic mean.
Exercise example N°4402 :
After a test, the marks of 26 students have been grouped in the table below :
| grade n | `0<=n<4` | `4<=n<8` | `8<=n<12` | `12<=n<16` | `16<=n<=20` |
|---|---|---|---|---|---|
| Number of students | 4 | 5 | 7 | ? | 7 |
statistics 9th Grade 10th Grade
The purpose of this corrected statistics exercise is to practice calculating the frequency of a series.
Exercise example N°4403 :
Here are the ages of the employees of a company, give the frequency of employees who are between 25 and 29 years old.
| Age | 20-24 | 25-29 | 30-39 | 40-49 | 49-60 |
|---|---|---|---|---|---|
| Employees | 2 | 6 | 2 | 1 | 3 |
statistics 9th Grade 10th Grade
The purpose of this corrected statistics exercise is to determine from a table the frequency of a series.