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aleksley [76]
2 years ago
11

Birth weights of a sample of newborn babies

Mathematics
1 answer:
Sophie [7]2 years ago
4 0

Answer:  Birth-weight (Kilogram) Number (n) Percentage (%)

4.1 – 4.5 4 1.0%

Total 387 100%

Step-by-step explanation:  In this sample of newborns, the minimum birth-weight was 2.5 Kg, and no babies were low-birth-weight (< 2.5 Kg) according to the WHO criteria. However, the vast majority (51%) of babies weighed between 2.5 Kg and 3.0 Kg at birth

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Answer:

160

Step-by-step explanation:

120/(3)/(4)

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2 years ago
Evaluate 3215.<br><br> Enter your answer as a whole number
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3215

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8 0
2 years ago
Lindsay is checking out books at the library, and she is primarily interested in mysteries and nonfiction. She has narrowed her
Ratling [72]

Answer:

0.0677 = 6.77% probability that they will all be nonfiction

Step-by-step explanation:

The books are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

In this question:

10 + 12 = 22 books.

She chooses 4 books, which means that n = 4

12 nonfiction, which meas that k = 12

What’s the probability that they will all be nonfiction?

This is P(X = 4). So

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

P(X = 4) = h(4,22,4,12) = \frac{C_{12,4}*C_{10,0}}{C_{22,4}} = 0.0677

0.0677 = 6.77% probability that they will all be nonfiction

7 0
3 years ago
Please help i begggggggggggggggg
xeze [42]
I’m pretty sure it’s A
5 0
3 years ago
Ben spent 2/3 of his allowance on video games. What is the fraction of his allowance expressed as a decimal?
Andrei [34K]
The is 0.666666666666666666667 so i dont know which way you want to swing because if you round up it is 0.7 and 0.6 doesn't repeat infintely so your choice
6 0
3 years ago
Read 2 more answers
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