Answer
a. 24.4 hr
b. 24.2 hr
c. 4.7 hr
d. 1.7 hr
e. $2.9\ hr^2$
f. Usually between 21 and 27.8 hours
g. No
h. Ratio
i. Continuous
j. No
Work Step by Step
a. The mean is equal to the sum of all of the values over the number of values, so we see that the mean is 24.4.
b. The median is the middle value, which is 24.2.
c. The range is the difference between the highest and lowest values, which is 4.7 hours.
d. We use the following equation for standard deviation:
$\sigma=\sqrt{\frac{\Sigma(x-\bar{x})^2}{n-1}}=1.7$
e. We find:
$\sigma^2=1.7^2=2.9$
f. Using the range rule of thumb, we find that the range is usually between 21 and 27.8 hours.
g. These times are not within the range of typical values.
h. The level of measurement is ratio.
i. The data are continuous.
j. Since the populations of these countries are so different, it would not make sense to treat the different time zones with different populations in the same way.
