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kolbaska11 [484]
2 years ago
5

If 89 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would di

ffer from the population mean by less than 48 grams
Mathematics
1 answer:
cricket20 [7]2 years ago
6 0

Answer:

0.6836

Step-by-step explanation:

(weight - mean weight) = 48

Variance, s² = 204,304

Sample size, n = 89

We need to obtain the Zscore :

Zscore = (X - mean) / standard Error

Zscore = (weight - mean weight ) / (s/√n)

s = √204304 = 452

The difference from the meanncoukdnbe either to the right or left :

Zscore = - 48 / (452/√89) OR 48 / (452/√89)

Zscore = - 48 / 47.911904 OR - 48 / 47.911904

Zscore = - 1.002 or 1.002

P(Z < - 1.002) = 0.1582 (using Z table)

P(Z < 1.002) = 0.8418

P(Z < 1.002) - P(Z < - 1.002)

0.8418 - 0.1582

= 0.6836

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creativ13 [48]
The correct question is
The hypotenuse and one of the legs of a right triangle form an angle that has a cosine of √<span>2/2 . 
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Let
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<span>I could say that
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the answer is the option
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3 years ago
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Brilliant_brown [7]
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Hope this helps :)
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Yes that is correct what is the question
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