The mean of a normal probability distribution is 500; the standard deviation is 10.
(a) About 68% of the observations lie between what two values?

(b) About 95% of the observations lie between what two values?

(c) Practically all of the observations lie between what two values?

a) (490,510)

b) (480,520)

c) (470,530)                                                  

Step-by-step explanation:

Mean, μ = 500

Standard Deviation, σ = 10

Empirical Rule:

a) 68% of the observations

About 68% of data lies within 490 and 510.

b) 95% of the observations

About 95% of data lies within 480 and 520.

c) All the observations

All of the observations lie between 470 and 530.

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.

step-by-step explanation:

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