Dr. Liu wants to learn how well the students in his research methods class performed on their final exam. He added together all
25 exam scores and then divided by 25. What measure of central tendency did Dr. Liu calculate?
A) modeB) medianC) meanD) standard deviation
A) modeB) medianC) meanD) standard deviation
2 answers:
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Answer:
Step-by-step explanation:
Let represent the number of monitors sold.
Given:
is the number of years since 1990.
So, for the year 1990, .
For the year 2000, 10 years passed. So, .
Now, monitors sold in 1990 are 150. So, at
Monitors sold in 2000 are 900. So, at
Thus, the two points are and
.
The slope of a line with points and
is given as:
Slope,
For the points and
, the slope is given as:
Slope,
Now, the y-intercept is the point where . So, the point
has
value as 0.
So, the y-intercept is 150.
Equation of a line in slope-intercept form is given as:
Where, is the slope and
is the y intercept.
Here, and
.
Therefore, the equation that represents the above data is given as: