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3 years ago

Mark all the Statements that are true:

Mathematics

1 answer:

Dmitry_Shevchenko [17]3 years ago

3 0

The graph represents the line x = 3.

Since there is more than one y-value for the one x-value provided, this graph is not a function.

The range is infinite, as there are no limits shown on the graph, and the slope is undefined.

The domain is only 3, since the only x-value on the graph is 3.

Based on this information, the statements that are true will be:

C. This graph is not a function because the value x = 3 is assigned to more than one y-value.

E. The equation of this line is x = 3.

(Note that D says the graph <em>is a function</em>. The graph isn't a function, as there is more than one y-value for x = 3.)

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One person wants to get a 95% z-confidence interval with a margin of error of at most 15 based on a population standard deviatio

Bess [88]

Answer:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean

$\sigma=60$ represent the population standard deviation

n represent the sample size (variable of interest)

Confidence =95% or 0.95

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

And on this case we have that ME =15, and we are interested in order to find the value of n, if we solve n from equation (1) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (2)

The critical value for 95% of confidence interval is provided, $z_{\alpha/2}=1.96$ , replacing into formula (2) we got:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

6 0

3 years ago

Can somebody please help me with this question

aleksandr82 [10.1K]

Answer:

An event can have a probability of 3/2 is not true

Step-by-step explanation:

The probability of an event happening is between 0 and 1 inclusive.

A probability of 1 means the event is certain to happen or 100%

You cannot have a probability greater than 1 so

An event can have a probability of 3/2 cannot happen

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2 years ago

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faust18 [17]

yes it is a smaller diagram than the angle o x y

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2 years ago

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S_A_V [24]

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Step-by-step explanation:

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3 years ago

How do I work this out?

Viktor [21]

Area of the shaded part is given by:
A=(area of the sector)-(area of triangle)
A=(θ/360πr²)-(1/2sinθab)
A=(120/360*π*6²)-(0.5*6²*sin120)
A=12π-15.59
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8 0

3 years ago