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3 years ago

HELP ASAP!!! THE BEST ANSWER GETS BRAINLIST! (15 POINTS)

Mathematics

1 answer:

Veseljchak [2.6K]3 years ago

6 0

Don’t click on the link please

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A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knowsthat some proportion of

Debora [2.8K]

Answer:

$0.1546\leq \widehat{p}\leq 0.3513$

Step-by-step explanation:

The firm tests 75 parts, and finds that 0.25 of them are notusable

n = 75

x = 0.25 \times 75 = 18.75≈19

$\widehat{p}=\frac{x}{n}$

$\widehat{p}=\frac{19}{75}$

$\widehat{p}=0.253$

Confidence level = 95%

So, Z_\alpha at 95% = 1.96

Formula of confidence interval of one sample proportion:

$=\widehat{p}-Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}\leq \widehat{p}\leq \widehat{p}+Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}$

$=0.253-(1.96)\sqrt{\frac{0.253(1-0.253)}{75}}\leq \widehat{p}\leq0.253+(1.96)\sqrt{\frac{0.253(1-0.253}{75}}$

Confidence interval $=0.1546\leq \widehat{p}\leq 0.3513$

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3 years ago

A transformation maps a onto b and c onto d name the image of a name the preimage of b name the image of c name the preimage of

Doss [256]

If a transformation maps $a \mapsto b$ , then $b$ is the image of $a$ , and $a$ is the preimage of $b$ . So,

the image of $a$ is $b$
the preimage of $b$ is $a$
the image of $c$ is $d$
the preimage of $d$ is $c$

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3 years ago

-6y + 10 = 8<br> I need to solve for y

Radda [10]

Answer:

$\frac{1}{3}$

Step-by-step explanation:

I did this bfor. You have got to trust me.

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3 years ago

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A circle and the lateral surface of a cone .

Anton [14]

In the case of a solid object, the boundary formed by these lines or partial lines is called the lateral surface; if the lateral surface is unbounded, it is a conical surface

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3 years ago

12 more than 8,2 times a number n

Sholpan [36]

Answer: 12+8.2n

Step-by-step explanation: Your basically adding 12 to 8.2 times n.

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3 years ago