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nexus9112 [7]
2 years ago
11

5 | 61251 is this true or false?

Mathematics
1 answer:
slamgirl [31]2 years ago
3 0

Step-by-step explanation:

the answer is false because its counting by 5

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The length of human pregnancies from conception to birth varies according to a distribution that is approximately normal with me
iragen [17]

Answer:

a) 229 and 305 days

b) 229 days or less

c) 305 days or more

Step-by-step explanation:

The Empirical Rule(68-95-99.7 rule) states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 267

Standard deviation = 19

(a) Between what values do the lengths of the middle 95% of all pregnancies fall?_____________and___________days

By the Empirical rule, 95% of all pregnancies fall within 2 standard deviations of the mean.

So

267 - 2*19 = 229 days

to

267 + 2*19 = 305 days

(b) How short are the shortest 2.5% of all pregnancies?______days or less

95% of all pregnancies fall within 2 standard deviations of the mean. The other 5% are more than 2 standard deviations from the mean. Since the distribution is symmetric, 2.5% is more than 2 standard deviations below the mean(shortest 2.5%) and 2.5% is more than 2 standard deviations above the mean(longest 2.5%). So

267 - 2*19 = 229 days

c) How long do the longest 2.5% of pregnancies last?________days or more

Explanation in b)

267 + 2*19 = 305 days

7 0
3 years ago
How to estimate 184÷9 in multiplication
FrozenT [24]
Do you mean checking your work? In that case it would be 9*20.
5 0
3 years ago
PLEASE! Is this correct?
Paladinen [302]
I believe it’s correct, but i’m not smart
6 0
3 years ago
You are painting the outside wall of a large building. The wall has a width of 60.11 meters, and a height of 79.88 meters. You n
77julia77 [94]

Answer: A)  4,800 m2

60.11m x 79.88= 4801.5868

5 0
2 years ago
Read 2 more answers
Will mark BRAINLIEST !
Neko [114]

Step-by-step explanation:

if u like this answer plz mark as brainlist

8 0
3 years ago
Read 2 more answers
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