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2 years ago

What is inter quartile range?

1 answer:

5 0

The difference between the number marking the third quartile (Q3) and the number marking first quartile (Q1).

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A line segment is drawn from (3, 2) to (3, 9) on a coordinate grid.

DiKsa [7]

Answer:

The answer is, C. Subtract 9 - 2

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3 years ago

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PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!

Sloan [31]

Answer:

Rita's recipe

Step-by-step explanation:

Use proportions and find it out. [Use s as sugar and c as cookies]

Rita's - 2s = 2c. would be 1 cup of sugar per dozen cookies.

Joahn's - 2s = 3c. would be 2/3 cup of sugar per batch of cookies

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3 years ago

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A quality control engineer is interested in estimating the proportion of defective items coming off a production line. In a samp

fenix001 [56]

Answer:

The lower bound of a 99% C.I for the proportion of defectives = 0.422

Step-by-step explanation:

From the given information:

The point estimate = sample proportion $\hat p$

$\hat p = \dfrac{x}{n}$

$\hat p = \dfrac{55}{100}$

$\hat p$ = 0.55

At Confidence interval of 99%, the level of significance = 1 - 0.99

= 0.01

$Z_{\alpha/2} =Z_{0.01/2} \\ \\ = Z_{0.005} = 2.576$

Then the margin of error $E = Z_{\alpha/2} \times \sqrt{\dfrac{\hat p(1-\hat p)}{n}}$

$E = 2.576 \times \sqrt{\dfrac{0.55(1-0.55)}{100}}$

$E = 2.576 \times \sqrt{\dfrac{0.2475}{100}}$

$E = 2.576 \times0.04975$

E = 0.128156

E ≅ 0.128

At 99% C.I for the population proportion p is: $\hat p - E$

= 0.55 - 0.128

= 0.422

Thus, the lower bound of a 99% C.I for the proportion of defectives = 0.422

6 0

2 years ago

How do you solve :<br><br><img src="https://tex.z-dn.net/?f=x%20%7B%7D%5E%7B2%7D%20%20%3D%20%20%5Cfrac%7B2%7D%7B3%7D%20" id="Tex

Neporo4naja [7]

$x^2=\dfrac{2}{3}\to x=\pm\sqrt{\dfrac{2}{3}}\\\\x=-\dfrac{\sqrt{2}}{\sqrt3}\ \vee\ x=\dfrac{\sqrt2}{\sqrt3}\\\\x=-\dfrac{\sqrt2\cdot\sqrt3}{\sqrt3\cdot\sqrt3}\ \vee\ x=\dfrac{\sqrt2\cdot\sqrt3}{\sqrt3\cdot\sqrt3}\\\\\boxed{x=-\dfrac{\sqrt6}{3}\ \vee\ x=\dfrac{\sqrt6}{3}}$

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3 years ago

at lake middle school, the average ratio of boys to girls in a a classroom is 3:2. use a proportion to predict the number of gir

Olin [163]

I believe the answer is 10 girls I'm pretty sure it is 10 girls

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3 years ago