Brainlist! I NEED THIS RIGHT NOE PLEASE. What is the domain of this graph?

Mathematics

2 answers:

Basile [38]3 years ago

7 0

Answer:

-3, -2, -1, 0, 1, 2, 3, 4

Step-by-step explanation:

Domain is just a fancy way of saying the x-values anything that is part of the line and is on the x-axis is a domain.

Hope that helps and have a great day!

nika2105 [10]3 years ago

7 0

Answer:

- 3, 4

Step-by-step explanation:

The domain is the first coordinate which means that it is x. The two points on this graph are ( - 3, 4 ) and ( 4, - 5 ). The two first coordinates of this set of ordered pairs are - 3 and 4. This means that - 3 and 4 are the domain of the graph.

Hope This Helps :)

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The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took these 100 customer

AlladinOne [14]

Answer:

$4-2.326\frac{1}{\sqrt{100}}=3.767$

$4+2.326\frac{1}{\sqrt{100}}=4.233$

So on this case the 98% confidence interval would be given by (3.767;4.233)

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".

$\bar X=4$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=1$ represent the population standard deviation

n=100 represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

Since the Confidence is 0.98 or 98%, the value of $\alpha=0.02$ and $\alpha/2 =0.01$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.01,0,1)".And we see that $z_{\alpha/2}=2.326$