Which type of correlation would you expect to see between the temperature and the number of ice cream bars sold?
A. positive correlation
B. negative correlation
C. no correlation
I disagree. What is your personal experience?
To determine the type of correlation between temperature and the number of ice cream bars sold, you would need to analyze the relationship between the two variables. Here's how you can approach this:
1. Collect data: Gather a dataset that includes temperature values and the corresponding number of ice cream bars sold.
2. Plot a scatter plot: Plot the temperature values on the x-axis and the number of ice cream bars sold on the y-axis. Each data point represents a temperature-ice cream sales pair.
3. Analyze the scatter plot: Look at the overall pattern of the data points. Are they mostly clustered around a straight line? Are they evenly dispersed? This will give you an initial idea of the relationship.
4. Determine the correlation coefficient: Calculate the correlation coefficient (e.g., using Pearson's correlation coefficient) to quantify the strength and direction of the relationship. The correlation coefficient ranges from -1 to 1. A value of 1 indicates a perfect positive correlation, -1 indicates a perfect negative correlation, and 0 indicates no correlation.
5. Interpret the correlation coefficient: Based on the calculated value, you can determine the type of correlation.
- If the correlation coefficient is close to 1, it suggests a positive correlation, meaning that as temperature increases, the number of ice cream bars sold also tends to increase.
- If the correlation coefficient is close to -1, it suggests a negative correlation, meaning that as temperature increases, the number of ice cream bars sold tends to decrease.
- If the correlation coefficient is close to 0, it suggests no correlation, meaning that there is little to no relationship between temperature and the number of ice cream bars sold.
So, to answer your question, A. Positive correlation would be expected between temperature and the number of ice cream bars sold if the correlation coefficient is close to 1.