Determine whether the random variable is discrete or continuous. In each case, state the possible values of the random variable
. (a) The number of free dash throw attempts before the first shot is made. (b) The distance a baseball travels in the air after being hit. (a) Is the number of free dash throw attempts before the first shot is made discrete or continuous?
Discrete data are the data whose value can be expressed in whole number. They cannot take all the values within an interval.
Discrete variables are usually counted than measured.
Continuous variable can be expressed in the form of decimals. They can take any value within an interval.
Continuous variables are usually measured than counted.
(a) The number of free dash throw attempts before the first shot is made.
Since the number of shots made will always be expressed in whole numbers and the number of shots made will counted and not measured. Thus, number of free dash throw attempts before the first shot is made. is a discrete variable.
(b) The distance a baseball travels in the air after being hit.
The distance is a continuous variable as its value can be expressed in decimals. Also distance is always measured and not counted. Thus, distance a baseball travels in the air after being hit is a continuous variable.
A graph of the data that was collected is shown: A line graph with Number of Months on the x axis and Number of Users, in thousands, on the y axis. The x axis has a scale from 0 to 36 with an increment of 4. The y axis has a scale of 0 to 60 with increments of 6. A straight line connecting 0, 0 and approximately 36, 54 is drawn. What can be interpreted from the range of this graph? v .
, each of 
, 
, 
, and 
have the same units digit.
, and since 
, it follows that 
and 
share the same units digits. So the units digit of 
is 8.