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Evgesh-ka [11]
3 years ago
5

Assume the readings on thermometers are normally distributed with a mean of 0 degrees C and a standard deviation of 1.00 degrees

C. Find the probability that a randomly selected thermometer reads greater than 2.17 and draw a sketch of the region.

Mathematics
1 answer:
lozanna [386]3 years ago
8 0

Answer: 0.0035

Step-by-step explanation:

Given : The readings on thermometers are normally distributed with a mean of 0 degrees C and a standard deviation of 1.00 degrees C.

i.e.  \mu=0 and \sigma= 1  

Let x denotes the readings on thermometers.

Then, the probability that a randomly selected thermometer reads greater than 2.17 will be :_

P(X>2.7)=1-P(\xleq2.7)\\\\=1-P(\dfrac{x-\mu}{\sigma}\leq\dfrac{2.7-0}{1})\\\\=1-P(z\leq2.7)\ \ [\because\ z=\dfrac{x-\mu}{\sigma}]\\\\=1-0.9965\ \ [\text{By z-table}]\ \\\\=0.0035

Hence, the probability that a randomly selected thermometer reads greater than 2.17 = 0.0035

The required region is attached below .

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Hence, a carpenter can paint a maximum of 7 chairs.

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Step-by-step explanation:

A carpenter has less than 120 min. to spend painting furniture each day.

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Also total time spent on painting furniture each day will be equal to time spent on painting a desk and all of the chairs.

Hence,

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6 0
3 years ago
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Given f(x)=x^3+kx-4, and x-1 is a factor of f(x), then what is the value of k?
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3

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2 years ago
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3 years ago
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