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Anestetic [448]
3 years ago
12

The probability that a random variable is greater than or equal to z standard deviations from the mean in a standard normal dist

ribution is p%. What can be said with certainty about the probability that the random variable is less than or equal to –z standard deviations from the mean?
Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
4 0
<span>P(Z≥z)=p<span>% may help out... (:
</span></span>
vladimir2022 [97]3 years ago
3 0

Answer:

B: The probability is equal to p%.

Step-by-step explanation:

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Anna35 [415]
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So it's D.
8 0
3 years ago
Jimmy's class has 4 jump ropes, and their average length is 112 meters. one jump rope is 34 meters, the second jump rope is 1 me
rusak2 [61]

In this problem, the average is already given. In order to solve for the missing length of jump rope we have the following solution:

Let x = be the total length

X = 4(112)

X = 448

Therefore,

34m + 1m + 212m = 247m

448m - 247m = 201 length of the fourth jump rope

3 0
3 years ago
Math- Differentiation . Could you help me to solve this question?
Arlecino [84]

Answer:

Step-by-step explanation:

Hello, first of all we can find a value for f(1)

xf(x)+f(x^2)=2 \\\\\text{So for x = 1, it gives}\\\\f(1)+f(1^2)=f(1)+f(1)=2f(1)=2\\\\ f(1) =1

And we can get the derivative of the equation so.

(uv)'=u'v+uv' \text{ and } \dfrac{df(x^2)}{dx}=2xf'(x^2) \text{ so we can write}\\\\f(x)+xf'(x)+2xf'(x^2)=0\\\\\text{And then, for x = 1}\\\\f(1)+f'(1)+2f'(1)=0\\\\ f(1)+3f'(1)=0\\\\ 3f'(1)=-f(1)=-1\\\\\large \boxed{ f'(1)=-\dfrac{1}{3} }

Thank you

4 0
3 years ago
Bella made a drawing of her rectangular bedroom with the scale of 1 inch=3 feet. the drawing was 6 inches long by 4 inches wide.
solmaris [256]
18 by 12 
because 6*3=18 and then 4*3=12 so this is your answer
3 0
3 years ago
A person standing on level ground is 2000 feet away from the foot of a 420-foot-tall building, as shown in the accompanying diag
antoniya [11.8K]

Answer:

12

Step-by-step explanation:

The formula for the tangent of an angle is the length of the opposite side divided by the length of the adjacent side. Therefore, the tangent of angle x is 420/2000=0.21. Taking the arctangent of that to get the angle, you get about 12 degrees. Hope this helps!

7 0
3 years ago
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