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kifflom [539]
2 years ago
13

Help me please someone

Mathematics
2 answers:
Genrish500 [490]2 years ago
8 0

Answer:

A.

Step-by-step explanation:

Nikolay [14]2 years ago
8 0
Your answer is A have a good day!
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Merta reports that 74% of its trains are on time. A check of 60 randomly selected trains shows that 38 of them arrived on time.
kenny6666 [7]

Answer:

No, the on-time rate of 74% is not correct.

Solution:

As per the question:

Sample size, n = 60

The proportion of the population, P' = 74% = 0.74

q' = 1 - 0.74 = 0.26

We need to find the probability that out of 60 trains, 38 or lesser trains arrive on time.

Now,

The proportion of the given sample, p = \frac{38}{60} = 0.634

Therefore, the probability is given by:

P(p\leq 0.634) = [\frac{p - P'}{\sqrt{\frac{P'q'}{n}}}]\leq [\frac{0.634 - 0.74}{\sqrt{\frac{0.74\times 0.26}{60}}}]

P(p\leq 0.634) = P[z\leq -1.87188]

P(p\leq 0.634) = P[z\leq -1.87] = 0.0298

Therefore, Probability of the 38 or lesser trains out of 60 trains to be on time is 0.0298 or 2.98 %

Thus the on-time rate of 74% is incorrect.

6 0
2 years ago
If (x/3)-1 is twice as large as (x/4)-3, what is the value of x?
Ganezh [65]

Answer:

30

Step-by-step explanation:

7 0
3 years ago
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What is 89 divide into 4356
ValentinkaMS [17]
Divide 89 by 4356
\frac{89}{4356} = 0.02 is the answer
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Why would a number line be divided into 20 parts?
prohojiy [21]

Answer:

_    _

1    2      all the way to twenty

Step-by-step explanation:

6 0
2 years ago
HAIDIEIEBFIEIQPKDNFJRJRFFGFFE
AVprozaik [17]

Answer:

thats alot

Step-by-step explanation:

feels bad to be in that position, fallen soldier :P

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2 years ago
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