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4 years ago

What operations are defined for any two real numbers?

Mathematics

1 answer:

Talja [164]4 years ago

6 0

Answer:

For the mathematical system that consists of the set of real numbers together with the operations of addition, subtraction, multiplication, and division, the resulting properties are called the properties of real numbers.

Closure Property of Addition also holds in real numbers: The sum of two real numbers is a real number.

multiplication pairs any two real numbers with a real number to become a product a×b

for all real numbers a and b, the difference denoted as a - b is defined by: a - b = a + (-b).

Hence we can also apply the BODMAS rule to the real numbers.

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The operating costs for each machine for one day have an unknown distribution with mean 1610 and standard deviation 136 dollars.

Lelechka [254]

Answer:

The standard deviation for the sample mean distribution is $\sigma_{\bar{X}}=\frac{136}{\sqrt{45}}=\frac{136\sqrt{5}}{15} \approx 20.274$

Step-by-step explanation:

The central limit theorem states that if you have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population then the distribution of the sample means will be approximately normally distributed.

For the random samples we take from the population, we can compute the standard deviation of the sample means:

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From the information given

The standard deviation σ = 136 dollars

The sample n = 45

Thus,

$\sigma_{\bar{X}}=\frac{136}{\sqrt{45}}=\frac{136\sqrt{5}}{15} \approx 20.274$

The standard deviation for the sample mean distribution is $\sigma_{\bar{X}}=\frac{136}{\sqrt{45}}=\frac{136\sqrt{5}}{15} \approx 20.274$

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| x- ( - 18) | if x < - 18

aleksandrvk [35]

Answer:

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Step-by-step explanation:

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