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oee [108]
3 years ago
5

Can someone please help me ASAP

Mathematics
1 answer:
dimulka [17.4K]3 years ago
7 0
-2,8 is the correct answer
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Find the critical value z Subscript alpha divided by 2 that corresponds to the given confidence level. 80​%
Neporo4naja [7]

Answer:

Conf= 0.80

With the confidence level we can find the significance level:

\alpha =1-0.8=0.2

And the value for \alpha/2=0.1. Then we can use the normal standard distribution and we can find a quantile who accumulates 0.1 of the area on each tail and we got:

z_{\alpha/2}= \pm 1.28

Step-by-step explanation:

For this problem we have the confidence level given

Conf= 0.80

With the confidence level we can find the significance level:

\alpha =1-0.8=0.2

And the value for \alpha/2=0.1. Then we can use the normal standard distribution and we can find a quantile who accumulates 0.1 of the area on each tail and we got:

z_{\alpha/2}= \pm 1.28

4 0
3 years ago
Find the value of x and y that make the quadrilateral
vitfil [10]

The quadrilateral have equal opposite sides, for example:

Then, (4x + 6) must be equal to (7x - 3), and (4y - 3) is equal to (3y + 1), therefore

4x+6=7x-3

We can solve that equation for x

\begin{gathered} 4x+6=7x-3 \\  \\ 3x=9 \\  \\ x=\frac{9}{3}=3 \end{gathered}

Hence, x = 3. Now let's solve the other equation

\begin{gathered} 4y-3=3y+1 \\  \\ y=4 \end{gathered}

Then the value of y is 4.

Final answers:

x = 3

y = 4

4 0
1 year ago
PLEASE HELP!!!
Oksanka [162]

Answer:

3x⁴ + x³ + 3 x² - 18 x + 4  

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The diameter of a sphere is 16 cm. What is the sphere's volume? Round to the nearest tenth. A) 971.7 cm3 B) 1072.3 cm3 C) 1137.4
Digiron [165]

Answer:

A

Step-by-step explanation:

4 0
3 years ago
Work out the area of this shape. ? cm2<br><br> 4 cm<br> 9 cm<br> 6 cm<br> 12 cm<br><br> Help!!!
mars1129 [50]

Answer:

84 cm^2

Step-by-step explanation:

Area of triangle + area of rectangle

Area of triangle = 1/2*l*b

= 1/2*8*3= 12 cm^2

Area of rectangle = l*b

= 12*6 = 72 cm^2

Total area= 72+12

= 84 cm^2

7 0
3 years ago
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