Question

Random samples of four different models of cars were selected and the gas mileage of each car was measured. The results are shown below. Model A / Model B / Model C / Model D 20 / 20 / 23 / 21 21 / 21

Answer 1

The average gas mileage of Model C is higher than that of the other models.

Step-by-step explanation:

The gas mileage data for four different car models (A, B, C, D) were collected, and the average gas mileage for each model was calculated. Model C has the highest average gas mileage, with a value of 23, indicating that, on average, cars of Model C achieve better gas mileage than those of Models A, B, and D.

This conclusion is drawn by computing the mean gas mileage for each model. The mean is calculated by adding up all the gas mileage values for a particular model and dividing by the number of observations. In this case, the average gas mileage for Model C is 23, which is higher than the averages for Models A (20), B (20), and D (21).

It's important to note that the sample size for each model is not equal, and this should be considered when interpreting the results. However, based on the available data, Model C demonstrates superior gas mileage on average compared to the other models.