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4 years ago

Please i need 5, now

Mathematics

1 answer:

zimovet [89]4 years ago

4 0

It is 153 meters
9*7 = 63
18*12= 216
216 - 63= 153

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for the data values below construct a 95 confidence interval if the sample mean is known to be 12898 and the standard deviation

Volgvan

Answer:

A 95% confidence interval for the population mean is [3315.13, 22480.87] .

Step-by-step explanation:

We are given that for quality control purposes, we collect a sample of 200 items and find 24 defective items.

Firstly, the pivotal quantity for finding the confidence interval for the population mean is given by;

P.Q. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample proportion of defective items = 12,898

s = sample standard deviation = 7,719

n = sample size = 5

$\mu$ = population mean

Here for constructing a 95% confidence interval we have used a One-sample t-test statistics as we don't know about population standard deviation.

So, 95% confidence interval for the population mean, $\mu$ is ;

P(-2.776 < $t_4$ < 2.776) = 0.95 {As the critical value of t at 4 degrees of

freedom are -2.776 & 2.776 with P = 2.5%}

P(-2.776 < $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ < 2.776) = 0.95

P( $-2.776 \times {\frac{s}{\sqrt{n} } }$ < ${\bar X-\mu}$ < $2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

P( $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ < $\mu$ < $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

95% confidence interval for $\mu$ = [ $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ , $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ]

= [ $12,898-2.776 \times {\frac{7,719}{\sqrt{5} } }$ , $12,898+2.776 \times {\frac{7,719}{\sqrt{5} } }$ ]

= [3315.13, 22480.87]

Therefore, a 95% confidence interval for the population mean is [3315.13, 22480.87] .

5 0

4 years ago

Find the perimeter of the shape on the right.

SCORPION-xisa [38]

Here is what to do:

Add like terms. For example, you can add apples to apples, but not apples to oranges. In other words, you can add similar values of x with its others, but not the values of x with regular numbers.

The answer is 3x-3

5 0

3 years ago

7 1/2 times 3 1/4 Help me

Gre4nikov [31]

= 15/2 ( 13/4

= 195/8

= 24.3

I hope that's help !

8 0

3 years ago

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List 3 responsibilities that a consumer has when making a purchase.

natima [27]

Answer: Inform Yourself Before Purchasing. While consumers have the right to be informed, they must also inform themselves to the best of their abilities about product and service knowledge.

Read and Follow Instructions. ...

Use Products and Services Property. ...

Step-by-step explanation: Hope this helps

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3 years ago

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A survey of a group of seventh-graders and a group of teachers at a local middle school asked how many siblings they each have.

adelina 88 [10]

Answer:

there both different the only same number is four

Step-by-step explanation:

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3 years ago