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True [87]
2 years ago
8

Which of the following ordered pairs are y-intercepts? Check all that apply.

Mathematics
2 answers:
Katarina [22]2 years ago
7 0
(0,0) , (0,-7), (0,-0.25)
Zolol [24]2 years ago
5 0

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\diamond\large\textsf{\textbf{\underline{\underline{Question:-}}}}\diamond

       Which of the following ordered pairs are y-intercepts?

\diamond\large\blue\textsf{\textbf{\underline{\underline{Answer and How to solve:-}}}}\diamond

All y-intercepts have an x-coordinate of 0.

So a y-intercept looks like this:-

\sf{(0,b)}

<u>Where:-</u>

        b - y-intercept

So we conclude that the right options are:-

\square\!\!\!\!\!\Large\checkmark (0,0)

\square\!\!\!\!\!\Large\checkmark (0, -7)

\square\!\!\!\!\!\Large\checkmark (0, -0.25)

<h3>Good luck.</h3>

         

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A data includes 108 body temperature od healthy adult humans having a mean of 98.2 f and a standard deviation of .64f. Contruct
leonid [27]

Answer: ( 98.04f, 98.40f ), it is not accepted

Step-by-step explanation: the question is suggesting we construct a 99% confidence interval for mean body temperature.

The formulae for Constructing a 99% confidence interval is given below as

u = x + Zα/2 × (s/√n)........... For the upper limit

u = x - Zα/2 × (s/√n)........... For the lower limit

Where u = population mean

x = sample mean = 98.2

s = sample standard deviation = 0.64

n = sample size = 108.

Zα/2 = critical value for a 2 tailed test performed at a 1% level of significance ( 100% - 99%) = 2.58

We are making use of our z test because sample size is greater than 30 ( n = 108).

By substituting the parameters, we have that

For upper limit

u = x + Zα/2 × (s/√n)

u = 98.2 + 2.58 ( 0.64/√108)

u = 98.2 + 2.58 ( 0.0616)

u = 98.2 + 0.1589

u = 98.4

For lower limit

u = x - Zα/2 × (s/√n)

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u = 98.2 - 2.58 ( 0.0616)

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u = 98.04.

Hence the 99% confidence interval for mean temperature of human is ( 98.04f, 98.40f )

Using 98.6f as the average mean body temperature is wrong because it is out of the confidence interval calculated above.

Our confidence interval states that at 99% confidence interval, an average human temperature should be at least 98.04f and at most 98.40f.

98.6f is out of the range.

4 0
3 years ago
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