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3 years ago

Can -62 be classified as a natural number

1 answer:

katrin2010 [14]3 years ago

7 0

No, -62 can't be classified as a natural number because natural numbers are the ones used for counting (1,2,3, etc.) Natural numbers are all positive numbers except for zero.

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I just need the answers on this and a couple other worksheets please.

Vika [28.1K]

Good lesson and good day ^-^

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3 years ago

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95

Galina-37 [17]

Answer:

The minimum sample size required for the estimate is 345.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The standard deviation is known to be 1.8.

This means that $\sigma = 1.8$

What is the minimum sample size required for the estimate?

This is n for which M = 0.19. So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.19 = 1.96\frac{1.8}{\sqrt{n}}$

$0.19\sqrt{n} = 1.96*1.8$

$\sqrt{n} = \frac{1.96*1.8}{0.19}$

$(\sqrt{n})^2 = (\frac{1.96*1.8}{0.19})^2$

$n = 344.8$

Rounding up to the next integer:

The minimum sample size required for the estimate is 345.

8 0

3 years ago

Please help me with this homework

Oxana [17]

M stands for the slope of the line and b is called the y-intercept of the line

4 0

3 years ago

Read 2 more answers

1. George's gross pay was $565. If he has to pay 1.45% to Medicare tax, how much will the Medicare tax deduction be?

larisa86 [58]

Answer: $8.19

Step-by-step explanation: Times 565 by 1.45% and that's what you get.

6 0

2 years ago

Read 2 more answers

Please HELP, ASAP!

Natasha_Volkova [10]

Idk u tell me cause im not the one

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3 years ago