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3 years ago

8

(-∞-)help me help me help me help me help me help me help me help me help me help me help me help me help me help me help me hel

p me help me help me

2 answers:

krok68 [10]3 years ago

7 0

Answer:

-3

Step-by-step explanation:

Elza [17]3 years ago

6 0

Answer:

the answer is -3 because -++ in the high eat number so the -7 is the bigest

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Which compound inequality can be used to solve the inequality 3x+2>7

kipiarov [429]

Answer:

3x + 2 < –7 or 3x + 2 > 7

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2 years ago

A rectangular prism shaped hamster cage is 13 incges tall. The perimeter of the base is 84 inches. The length of the base is 5 t

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Step-by-step explanation:

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2 years ago

A fast food restaurant executive wishes to know how many fast food meals adults eat each week. They want to construct a 98% conf

adelina 88 [10]

Answer:

$n=(\frac{2.326(1.1)}{0.07})^2 =1336.006 \approx 1337$

So the answer for this case would be n=1337 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma=1.1$ represent the population standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =0.07 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formula to find it:"=-NORM.INV(0.01;0;1)", and we got $z_{\alpha/2}=2.326$ , replacing into formula (b) we got:

$n=(\frac{2.326(1.1)}{0.07})^2 =1336.006 \approx 1337$

So the answer for this case would be n=1337 rounded up to the nearest integer

3 0

3 years ago

A container holds 50 electronic components, of which 10 are defective.

Gala2k [10]

Answer:

There is some inforrmation that is missing in this question. It should read:

A container holds 50 electronic components, of which 10 are defective. If 6 components are drawn at random from the container, the probability that at least 4 are not defective is . If 8 components are drawn at random from the container, the probability that exactly 3 of them are defective is .

Answers

Part 1. 0.02

Part 2. 0.0375

Explanation

The probability is a chance of an event happening. It is calculated as;

probability = (Number of favourable outcome)/(Number of available outcome)

Part 1

6 are chosen at random. If 4 are not defective, then 2 are defective.

P(at least 4 are not defective) = 4/40 × 2/10

= 1/10 ×1/5

= 1/50

= 0.02

Part 2

8 are chosen at random. If 3 are defective, the 5 are not defective.

P(3 are defective) = 3/40 × 5/10

= 15/400

= 3/80

= 0.0375

Step-by-step explanation:

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3 years ago

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3 years ago