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3241004551 [841]
2 years ago
10

Enter the correct answer in the box.

Mathematics
2 answers:
Marina86 [1]2 years ago
8 0

Answer:

the anwser is x and it represents 350

Step-by-step explanation:

Rudik [331]2 years ago
4 0

Answer:

350/ x+20 + 350/ x-20 = 6

Step-by-step explanation:

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The operations manager of a large production plant would like to estimate the mean amount of time a worker takes to assemble a n
xz_007 [3.2K]

Answer:

(15,595, 16,805)

Step-by-step explanation:

We have to:

m = 16.2, sd = 3.75, n = 150

m is the mean, sd is the standard deviation and n is the sample size.

the degree of freedom would be:

n - 1 = 150 - 1 = 149

df = 149

at 95% confidence level the t is:

alpha = 1 - 95% = 1 - 0.95 = 0.05

alpha / 2 = 0.05 / 2 = 0.025

now well for t alpha / 2 (0.025) and df (149) = t = 1,976

the margin of error = E = t * sd / (n ^ (1/2))

replacing:

E = 1,976 * 3.75 / (150 ^ (1/2))

E = 0.605

The 95% confidence interval estimate of the popilation mean is:

m - E <u <m + E

16.2 - 0.605 <u <16.2 + 0.605

15,595 <u <16,805

(15,595, 16,805)

5 0
3 years ago
Which equation demonstrates the associative property of multiplication
kherson [118]

Answer:

from what I remember ide say A

3 0
3 years ago
He decided to get a job in order to pay her back. On his way to the pet store to apply for a job as a dog groomer, he found a do
Mazyrski [523]
He got an extra dollar
3 0
3 years ago
Read 2 more answers
Choose the number that is 5 more than a square number.<br> 21<br> 34<br> 35<br> 65<br> 76
Ipatiy [6.2K]
5 more than a square number would be 21 which is 5 more than 16 (the square of 4)
3 0
3 years ago
Read 2 more answers
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 280 engines
DENIUS [597]

Answer:

The value of the test statistic is t = -2.09

Step-by-step explanation:

The null hypothesis is:

H_{0} = 6.6

The alternate hypotesis is:

H_{1} \neq 6.6

Our test statistic is:

t = \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(square roof of the variance) and n is the size of the sample.

In this problem, we have that:

X = 6.5, \mu = 6.6, \sigma = \sqrt{0.64} = 0.8, n = 280

So

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

t = \frac{6.5 - 6.6}{\frac{0.8}{\sqrt{280}}}

t = -2.09

The value of the test statistic is t = -2.09

4 0
3 years ago
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