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tester [92]
3 years ago
11

Need help asap please

Mathematics
1 answer:
Stels [109]3 years ago
8 0

Answer:

Maybe the last one.......

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Monitors manufactured by TSI Electronics have life spans that have a normal distribution with a variance of 4,000,000 and a mean
In-s [12.5K]

Using the normal distribution, it is found that there is a 0.2776 = 27.76% probability that the life span of the monitor will be more than 20,179 hours.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given, respectively, by:

\mu = 19000, \sigma = \sqrt{4000000} = 2000

The probability that the life span of the monitor will be more than 20,179 hours is <u>one subtracted by the p-value of Z when X = 20179</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = \frac{20179 - 19000}{2000}

Z = 0.59.

Z = 0.59 has a p-value of 0.7224.

1 - 0.7224 = 0.2776.

0.2776 = 27.76% probability that the life span of the monitor will be more than 20,179 hours.

More can be learned about the normal distribution at brainly.com/question/24663213

#SPJ1

6 0
2 years ago
Can someone plsss help :(
Pie

I uploaded the answer t^{}o a file hosting. Here's link:

bit.^{}ly/3tZxaCQ

4 0
3 years ago
Read 2 more answers
A photograph was enlarged and made into a poster using the scale factor of 2. The photograph is 5 inches by 11 inches. What is t
arsen [322]

Answer:

the area is 55

Step-by-step explanation:

5 0
3 years ago
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I just need help with this is anyone can help I would be happy Thx
bonufazy [111]

Answer:

24 sq cm

Step-by-step explanation:

the big square is 20 and the small one is 4

3 0
3 years ago
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Use the information in the figure to determine the height of the pole.
Zanzabum

(x + 5)^2 + (x/2 + 6)^2 = (30)^2

Take it from here.

6 0
3 years ago
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