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kirill115 [55]
4 years ago
11

We conduct a study to determine whether the majority of community college students plan to vote in the next presidential electio

n. We choose a significance level of 0.05. We survey 650 randomly selected community college students and find that 54% of them plan to vote. The P-value is 0.02. LaTeX: H_0H 0: 50% of community college students plan to vote in the next presidential election. LaTeX: H_aH a: More than 50% of community college students plan to vote in the next presidential election. What can we conclude
Mathematics
1 answer:
jenyasd209 [6]4 years ago
5 0

Answer:

most of the students will vote in the following presidential elections because the p value is lower than the level of statistical significance

Step-by-step explanation:

Alfa=0.05

so we have to

P-value is 0.02

considering that alpha is greater than p

P-value (0.02) < alpha (0.05)

we conclude that the null hypothesis is rejected

Interpretation

Taking the alpha value as the statistical level of significance, it can be said that more than 50% of the students will vote in the following presidential elections.

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aleksandrvk [35]

MOE = +\- 1.27

The 99% confidence interval ranges from 53.73 to 56.27 hours.

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4 years ago
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11) V = tr2h solve for r2​
Trava [24]

Answer:

r^{2}=\frac{V}{\pi h}

Step-by-step explanation:

To solve an equation for one of its variables do that:

  1. Underline the variable
  2. Separate it one side and the other terms on the other side
  3. Make its coefficient equal to 1

Let us use these steps to solve our question

∵ V = πr²h

→ Underline r²

∴ V = π<u>r²</u>h

→ Take π and h to the other side by dividing both sides by πh

∵ \frac{V}{\pi h}=\frac{\pi r^{2}h}{\pi h}

∴ \frac{V}{\pi h}=r^{2}

→ The coefficient of r² is 1, so switch the two sides

∴ r^{2}=\frac{V}{\pi h}

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4 years ago
What is the mean absolute deviation of 1, 2, 2, 3, 5, 6, 6, 8, 8, 9
nikdorinn [45]

Answer:

5

Step-by-step explanation:

1+2+2+3+5+6+6+8+8+9/10=5

6 0
2 years ago
Special triangles find the value of x
In-s [12.5K]

Answer:

x = 50

Step-by-step explanation:

Since this is a right triangle we can use special triangles

The angle next to the x is 60 degrees since it is a 30 60 90 triangle

The side opposite the 30 degree angle is the shorter side

The hypotenuse - 2 * shorter leg

100 = 2 * x

x = 50

3 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Cboxed%7B%5Cblue%7B%5Cmathscr%7BHello%5C%3ABrainliacs%7D%7D%7D" id="TexFormula1" title="\box
andrew-mc [135]

For the reaction,

CO(g) + H_2 O(g) = CO_2(g) + H_2(g)

Initial concentration:

<u>0.1M</u> , <u>0.1M</u> , <u>0</u> , <u>0</u>

Let 'x' mole per litre of each of theproduct be formed.

At equilibrium:

<u>(0.1 – x)M</u> , <u>(0.1 – x)M</u> , <u>xM</u> , <u>xM</u>

where x is the amount of Carbon dioxide and Hydrogen, at equilibrium.

Hence, equilibrium constant can be written as,

K_c = \frac{x²}{(0.1 – x)²} = 4.24

→ x² = 4.24 (0.01 + x² – 0.2x)

→ x² = 0.0424 + 4.24 x² - 0.848x

→ 3.24x² - 0.848x + 0.0424 = 0

<em>a = 3.24, b = -0.848, c = 0.0424</em>

(for quadratic equation ax² + bx+c=0)

x =  \frac{( - b \: ± \: \sqrt{ {b}^{2} - 4ac) } }{2a}

=  > x =  \frac{ - ( - 0.848 \: ± \:  \sqrt{( - 0.848)^{2} - 4(3.24)(0.0424) } }{2 \times 3.24}

=  > x =  \frac{ - 0.848±0.4118}{6.48}

x_1 =  \frac{0.848 - 0.4118}{6.48} = 0.067

x_2 =  \frac{0.848 + 0.4118}{6.48} = 0.194

Here, the value 0.194 should be neglected because it will give concentration of the reactant which is more than initial concentration.

∴ The equilibrium concentrations are :-

[CO_2] [H_2] = x = 0.067M

[CO] [H_2 O] = 0.1 - 0.067 = 0.033M

7 0
3 years ago
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