1) Calculate mean daily temperature using the data in the chart below. Give the answer to two decimal places. 2) Calculate mean daily temperature change = diurnal range using the data in the chart .

1) The mean daily temperature is 19.75 ºC.

2) The mean daily change is 22 ºC.

Explanation:

1) The mean daily temperature (), measured in degrees Celsius, is the average of the temperature chart, which is represented by definition of average:

(1)

Where:

- Number of registered temperatures, no unit.

- i-th Temperature, measured in degrees Celsius.

Now we proceed to calculate the mean daily temperature:

The mean daily temperature is 19.75 ºC.

2) The mean daily change is the range between maximum and minimum of the data in the chart. That is:

(2)

If we know that and , then the mean daily change is:

The mean daily change is 22 ºC.