Final Answer:
The standard deviation (SD) calculated in Question 4 provides a measure of the spread or variability in the data for text messaging in cars.
Step-by-step explanation:
Standard deviation is a statistical measure that quantifies the amount of variation or dispersion in a set of data. In the context of Question 4, where the focus is on text messaging in cars, the standard deviation (SD) specifically tells us how much individual data points deviate from the mean of the dataset.
The calculation of standard deviation involves several steps. Firstly, calculate the mean (μ) of the dataset, which represents the average value. Then, for each data point, find the difference between the data point and the mean, square that difference, and finally, find the average of these squared differences. The square root of this average yields the standard deviation.
A higher standard deviation indicates greater variability or spread in the data, suggesting that data points are more dispersed from the mean. Conversely, a lower standard deviation suggests that data points are closer to the mean, indicating less variability. Therefore, in the context of text messaging in cars, the standard deviation calculated in Question 4 provides valuable insights into the extent of variability or spread in the data, helping to understand the consistency or variability in text messaging behavior among car users.