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liberstina [14]

3 years ago

8

Use the box plot to answer the questions! 40 42 44 448 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 1. What is the median in the

box plot shown? What is the IQR?

2 answers:

Katarina [22]3 years ago

6 0

Answer:

Median: 61

IQR: 20

Step-by-step explanation:

Usimov [2.4K]3 years ago

6 0

Answer:16

Step-by-step explanation:

No time

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Suppose that the population of the scores of all high school seniors who took the SAT Math (SAT-M) test this year follows a Norm

Vlad1618 [11]

Answer:

Confidence = $1-\alpha=1-0.01=0.99$

And then the confidence level would be given by 99%

Step-by-step explanation:

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".

Assuming the X follows a normal distribution

$X \sim N(\mu, \sigma)$

The distribution for the sample mean is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

$\bar x =512$ represent the sample mean

$\sigma=100$ represent the population standard deviation

n= 100 sample size selected.

The confidence interval is given by this formula:

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

The marginof error for this case is given by Me=25.76. And we know that the formula for the margin of error is given by:

$Me=z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

$25.76=z_{\alpha/2} \frac{100}{\sqrt{100}}$

And we can find the critical value $z_{\alpha/2}$ like this:

$z_{\alpha/2}=\frac{25.76(\sqrt{100})}{100}=2.576$

And we know that on the right tail of the z score =2.576 we have $\alpha/2$ of the total area. We can find the area on the right of the z score using this excel code:

"=1-NORM.DIST(2.576,0,1,TRUE)" or using a table of the normal standard distribution, and we got 0.004998= $\alpha/2$ , so then $\alpha=0.00498*2=0.009995 \approx 0.01$ , and then we can find the confidence like this:

Confidence = $1-\alpha=1-0.01=0.99$

And then the confidence level would be given by 99%

8 0

3 years ago

What is my weighted grade please explain how it's done.

salantis [7]

That's not enough information to calculate your grade from.

-- You've told us the scores you have in things that go together
to make up (35 + 5 + 25) = 65% of your grade.

-- We don't know your scores in the things that make up the other
35% of your grade.

4 0

3 years ago

Improper fraction for 3 1/14

TEA [102]

Answer: 43/14

Step-by-step explanation: You take you 3 and times it by 14 and + 1 because the equation is saying 14/14 3 times plus the 1/14,

So 3 times 14=42

42+1=43 and then you take the 43 and put it over the 14 so now you have your answer: 43/14

5 0

3 years ago

Read 2 more answers

Write the following 12.5% as a fraction

Masteriza [31]

1/8 is a fraction to represent 12.5%

8 0

3 years ago

Read 2 more answers

A solar fire starter is designed so that its cross-sections are in the shape of a parabola. Given that the diameter of the solar

Fofino [41]

Answer:

$x=0.04m$

Step-by-step explanation:

From the question we are told that:

Diameter $d=24cm$

Radius $r=24/2=>12cm$

Igniter distance $d_g=9cm$

Generally the equation for depth is mathematically given by

$r^2=4d_gx$

Therefore

$x=\frac{r^2}{4d_g}$

$x=\frac{12^2}{4*9}$

$x=4cm$

$x=0.04m$

6 0

2 years ago