Answer:
Option D) The number of standard deviations a measurement is from the mean
Step-by-step explanation:
Standard Score:
- Standard score is also known as the z-score, z-value, normal scores or the standardized score.
- It tells us about the values of standard deviations by which the value of data point is above or below the mean value.
- The standard score for a data point may be negative or positive.
- It is obtained by subtracting the population mean from the data point and then dividing it by the population standard deviation.

- It is known as standardization or normalization.
Thus, standard score can be defined as:
Option D) The number of standard deviations a measurement is from the mean
Answer:
The parametric equations represents an ellipse by the rectangular equation
.
Step-by-step explanation:
We proceed to use the following trigonometric identity to derive an expression in rectangular form:
(1)
Where:
and 
Then, we expand the expression as follows:
(2)
The parametric equations represents an ellipse by the rectangular equation
.
Answer:
roots at (-2,0) and (2,0)
vertex (maximum) at (0,4)
Step-by-step explanation:
It can increase business profits