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elena-s [515]
3 years ago
8

Error analysis- MULTIPLY AND DIVIDE DECIMALS

Mathematics
1 answer:
hram777 [196]3 years ago
8 0
Hey. Why are you so worried. Here is the answer. There is a very small problem.It is that the decimal point is not added.

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Statistics question; please help.
Alex_Xolod [135]

Answer:

Does this sample provide convincing evidence that the machine is working properly?

Yes.

Step-by-step explanation:

<u>Normal distribution test:</u>

$z=\frac{x- \mu }{ \frac{\sigma}{\sqrt{n}} }=\frac{ (x-\mu)\sqrt{n}}{\sigma}  $

Where,

x: \text{ sample mean}

\sigma: \text{ standard deviation}

n: \text{ sample size determination}

\mu: \text{ hypothesized size of the screw}

$z=\frac{(1.476-1.5)\sqrt{200} }{0.203 } $

$z=\frac{(-0.024)10\sqrt{2} }{0.203 } $

z \approx -1.672

Once the significance level was not given, It is usually taken an assumption of a 5% significance level.

Taking the significance level of 5%, which means a confidence level of 95%, we have a z-value of \pm 1.96

Therefore, we <u>fail to reject the null</u>. It means that the hypothesis test is not statistically significant: the average length is not different from 1.5!

7 0
3 years ago
What is the value of x in 5x - 7 = y, if y =8
quester [9]
<h3>Answer:  x = 3</h3>

To get that answer, we replace y with 8 and then isolate x.

5x-7 = y

5x-7 = 8

5x = 8+7

5x = 15

x = 15/5

x = 3

3 0
2 years ago
Read 2 more answers
PLZ HELP ASAP!!!!!!!!
ivanzaharov [21]

Answer: 3:2

Step-by-step explanation:

the base ratio of unused tape to used tape is 24:16.

then we have to simplify,

both 16 and 24 can be divided by eight,

24 divided by eight is 3

16 divided by eight is 2

therefore, our simlpified ratio is 3:2

hope this helped! <3

5 0
2 years ago
How many solutions does the system have?<br><br> {y=−2x+2 <br> y=x^2-3x
Savatey [412]
The system. only really just possibly. have one solution
7 0
3 years ago
PLEASE HELP I NEED HELP ITS MULTIPLYING FRIACTIONS AND MIXED FRACTIONS
salantis [7]
Hello! the answers are (going across) 72/90 , 6/21 , 11/24 , 100/4 , 121/12 , 175/48
if u need me to explain how i got this, feel free to message me ! have a nice day:)<3
7 0
3 years ago
Read 2 more answers
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