3 years ago

I need help on this plss

Mathematics

1 answer:

Evgesh-ka [11]3 years ago

8 0

Answer:

there's no question/picture posted btw

Step-by-step explanation:

You can ask it again, i think you forgot to add the question ._.

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The lifetime of a certain brand of battery is known to have a standard deviation of 9 hours. Suppose that a random sample of 90

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Answer:

lower limit : 36.44

upper limit : 39.56

Step-by-step explanation:

Given :

s = 9

n = 90

x = 38.9

Alpha, α = 0.10

∴ $z_{\alpha/2}=z_{0.05} = 1.645$

The confidence interval is :

$=x \pm\left(z_{\alpha /2} \times \frac{s}{\sqrt{n}}\right)$

$=38.9 \pm\left(1.645 \times \frac{9}{\sqrt{90}}\right)$

$=38.9 \pm 1.56$

$=(36.44, 39.56)$

Therefore,

lower limit : 36.44

upper limit : 39.56

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Answer:

18 square units.

Step-by-step explanation:

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3 years ago

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Zarrin [17]

A disjunction is a statement formed by combining two statements with the word and is FALSE.

Answer: B) False or the second option.

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3 years ago

Please help me with this on the image

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Answer:

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Answer:

o{(8,4), (6,4), (9,1),(7-6)}

Step-by-step explanation:

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