1.1. Key Concepts

Try these first

1. 1.

   Define the terms 'population' and 'sample'.

   Hint

   Think of how you would collect data.

2. 2.

   What is the mean in statistics?

   Hint

   What do you do to find an average?

3. 3.

   What is a population in statistics?

   • The entire data set
   • A random sample
   • A subset of data

   Hint

   Consider what is included in a full study.

4. 4.

   True or False: The mode is always affected by outliers.

   • True
   • False

   Hint

   What does mode represent?

5. 5.

   You have the following data on temperature and ice cream sales: (70, 100), (75, 150), (80, 200). Use regression to estimate sales based on temperature.

   Hint

   Recall how to compute the slope and use given pairs.

6. 6.

   A dataset contains 100 measurements taken from a sensor, with values mostly clustering between 50 and 60 but including outliers at 10 and 100. Calculate the mean, median, and mode.

   Hint

   Ensure you understand how to handle outliers for accurate statistics.