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3 years ago

12

Amy rolls a number cube ten times and gets 3 four times! If she rolls the number cube 240 times, how many times should she get a

3?

1 answer:

djyliett [7]3 years ago

5 0

She should get three 96 times

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A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time student

Butoxors [25]

Answer: $(21.541,\ 23.059)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : $n=240$ , which is a large sample , so we apply z-test .

Sample mean : $\overline{x}=22.3$

Standard deviation : $\sigma= 6$

Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.960$

Now, a confidence interval at the 95% level of confidence will be :-

$22.3\pm(1.960)\dfrac{6}{\sqrt{240}}\\\\\approx22.3\pm0.759\\\\=(22.3-0.759,\ 22.3+0.759)\\\\=(21.541,\ 23.059)$

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3 years ago

What is the volume? 7 mm 7 mm 7 mm cubic millimeters

Oksanka [162]

$\Huge\bf\overbrace{\underline{ \underbrace{\blue \dag \orange{Answer}}}} \blue\dag$

$\large\bf\mapsto{\underline{\red{volume \: of \: cube = {a}^{3} }}}$

$\huge\bf\mapsto{\underline{\green{ {7}^{3} }}}$

$\Large\bf\leadsto{\underline{\purple{ \: 7 \times 7 \times 7 = 343}}}$

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3 years ago

Si mi hermano gana 589 pesos diarios si ha trabajado 15 días de este mes ¿cuánto dinero ha ganado?

weeeeeb [17]

Mi hermano ha ganado un dinero <em>devengado</em> de 8835 pesos en 15 días.

En esta pregunta debemos determinar el dinero <em>devengado</em> por un período de 15 días a partir de una tasa diaria <em>constante</em>. Esa cantidad es igual al producto de la tasa diaria <em>constante</em>, en pesos por día, y el número de días <em>trabajados</em>, en días:

$x = 589\,\frac{\$}{dia}\times 15\,dias$

$x = 8835\,\$$

Mi hermano ha ganado un dinero <em>devengado</em> de 8835 pesos en 15 días.

Para aprender más sobre álgebra y aritmética, invitamos cordialmente a ver esta pregunta: brainly.com/question/953809

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2 years ago

The number of gallons of coffee a mathematician drinks on any given day is inversely proportional to how much sleep he gets the

sladkih [1.3K]

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Pepsi [2]

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