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2 years ago

The standard deviation assumes a negative value when

Mathematics

1 answer:

rosijanka [135]2 years ago

8 0

... when the universe grows cold. (Or someone made a typesetting mistake.)

Standard deviation is the square root of a non-negative number. It will NEVER be negative.

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A quality control engineer at a potato chip company tests the bag filling machine by weighing bags of potato chips. Not every ba

jekas [21]

Answer:

The test statistic is z = 1.865.

Step-by-step explanation:

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

H0: p = 0.11

This means that 0.11 is tested at the null hypothesis, and so:

$\mu = 0.11$

$\sigma = \sqrt{0.11*0.89} = 0.3129$

The engineer weighs 94 bags and finds that 16 of them are over-filled.

This means that:

$n = 94, X = \frac{16}{94} = 0.1702$

What is the test statistic?

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{0.1702 - 0.11}{\frac{0.3129}{\sqrt{94}}}$

$z = 1.865$

The test statistic is z = 1.865.

6 0

2 years ago

Lewis checked the balance of his savings

vichka [17]

Answer:

Linear

Step-by-step explanation:

The balances each go up by $110

300 + 110 = 410

410 + 110 = 520

520 + 110 = 630

4 0

3 years ago

(x-2) Divided By (x^3-4x^2+ 6x-4) long divison

gayaneshka [121]

<span> x2 - 2x + 2
hope this helps</span>

8 0

3 years ago

If there are 26 students in each third-grade class and 3 third-grade classes in the school, how many students will attend an ass

ddd [48]

Answer:

Step-by-step explanation:

26 • 3 = 78 - 4 = 74

8 0

3 years ago

Which statement is true about the difference 2 square root of 7 − square root of 26?

lora16 [44]

2√7 - √26 ≈ 5.29150262213... - 5.09901951359...

... ≈ 0.19248310854...

The result is an irrational number not described by any of your answer selections.

None of the statements is true.

7 0

3 years ago