To find the new mean after increasing each piece of data by 10, we need to add 10 to each of the original data points and then calculate the mean again.
Original data set: 2.4, 1.6, 3.2, 0.3, 1.5
After increasing each piece by 10, the new data set becomes: 12.4, 11.6, 13.2, 10.3, 11.5
Now, let's calculate the new mean:
Mean = (Sum of all data points) / (Number of data points)
Sum of new data points = 12.4 + 11.6 + 13.2 + 10.3 + 11.5
Number of data points = 5
Now, divide the sum by the number of data points to find the new mean.