Why could the mean of the data set below be misleading? 10 points! <3

2 answers:

8 0

the mean can be misleading, because there outlier (77), which is not close to the ages of the others, thereby changing the mean drastically.

hope this helps

strojnjashka [21]3 years ago

5 0

The mean or average of the data set would be misleading because there is an outlier, meaning that one of the numbers is either significantly lower or higher than the rest. That can be seen here because of the number 77.

Mean with ALL numbers : 35.3

Mean with all EXCEPT outlier : 27.6

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Consider the parabola given by the equation: f(x) = 4x² - 6x - 8 Find the following for this parabola: A) The vertex: Preview B)

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Answer:

The vertex: $(\frac{3}{4},-\frac{41}{4} )$

The vertical intercept is: $y=-8$

The coordinates of the two intercepts of the parabola are $(\frac{3+\sqrt{41} }{4} , 0)$ and $(\frac{3-\sqrt{41} }{4} , 0)$

Step-by-step explanation:

To find the vertex of the parabola $4x^2-6x-8$ you need to:

1. Find the coefficients a, b, and c of the parabola equation

$a=4, b=-6, \:and \:c=-8$

2. You can apply this formula to find x-coordinate of the vertex

$x=-\frac{b}{2a}$ , so

$x=-\frac{-6}{2\cdot 4}\\x=\frac{3}{4}$

3. To find the y-coordinate of the vertex you use the parabola equation and x-coordinate of the vertex ( $f(-\frac{b}{2a})=a(-\frac{b}{2a})^2+b(-\frac{b}{2a})+c$ )