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mixas84 [53]
3 years ago
14

P>-1 I need help fast I have to pass this

Mathematics
1 answer:
Sati [7]3 years ago
6 0
Your answer would be the last one
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A quality control expert at LIFE batteries wants to test their new batteries. The design engineer claims they have a variance of
emmainna [20.7K]

Answer:

z = \frac{981.7 -997}{\frac{62}{\sqrt{73}}}= -2.108

And we can use the normal standard distribution table or excel and with the complement ruler we got:

P(z>-2.108) =1- P(z

Step-by-step explanation:

We know the following info given:

\mu = 997 represent the true mean

\sigma = \sqrt{3844}= 62 represent the population deviation

n = 73 represent the sample size selected

Since the sample size is large enough (n>30) we can use the central limit theorem and the sample mean would have the following distribution:

\bar X \sim N (\mu, \frac{\sigma}{\sqrt{n}})

And for this case we want to find this probability:

P(\bar X >981.7)

And we can use the z score formula given by:

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

And replacing we got:

z = \frac{981.7 -997}{\frac{62}{\sqrt{73}}}= -2.108

And we can use the normal standard distribution table or excel and with the complement ruler we got:

P(z>-2.108) =1- P(z

3 0
3 years ago
43 1/3 rounded​ to the nearest whole number
lutik1710 [3]
Rounded to the nearest whole number is still 43
6 0
3 years ago
Read 2 more answers
**At noon the minute and the hour hands overlap. When will it happen next?
Svetllana [295]

Answer: At 01:05 p.m. it will overlap again.

Explanation:

Since there are 22 times in a day the minute and the hour hands overlap.

During the first half of the day , it overlaps 11 times and during the rest of the day it overlap 11 more times.

At noon, the minute and the hour hands overlap and after that it will happen at 01:05 p.m.

Since the minute hand completes a full circle in one hour, so it forms 6 degrees per minute .

So, at 01:05 p.m. it will overlap again.

7 0
3 years ago
Please solve asap thanks ​
natima [27]

Answer:

6x+36=180

6x=144

x=24

Step-by-step explanation:

this is the correct answer

8 0
3 years ago
Read 2 more answers
Is this correct? pls be sure of yourself. if you arent, pls check
Elza [17]

Answer:

Yes It Is.

Step-by-step explanation:

8 0
3 years ago
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