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3 years ago

There are 8 players in a chess tournament. after the tournament each player has to shake hands with e

1 answer:

8 0

<span>There are 8 players in a chess tournament. After the tournament each player has to shake hands with every other player. Which number sentence below is the best way to show the number of handshakes?
Answer :
</span><span>7+6+5+4+3+2+1= 28</span>

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What is an equation of a line passing through the given point

Mademuasel [1]

I believe it is y=mx+b..........y equals slope times x plus the y intercept...or y=-8/3x+4.that would mean your slope would be negative. meaning it would go from the left top hand corner and fall through to the bottom right hand corner.

4 0

3 years ago

Work out the area of a circle with the radius of 1 m

777dan777 [17]

Answer:3.14

Step-by-step explanation:

r=pi*r sqaured

4 0

3 years ago

Read 2 more answers

Make 8 10 times as much

Neporo4naja [7]

80 would be the answer i guess can you explain more in depth?

6 0

3 years ago

A surveyor has poles A, B, and C set to form a right triangle with the right angle at B. If the distance from A to B is 35 meter

tia_tia [17]

A^2+b^2=c^2
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So the answer is 25

6 0

3 years ago

A certain change in a process for manufacture of component parts is being considered. Samples are taken using both the existing

Katyanochek1 [597]

Answer:

a) The confidence interval is $0.00\leq\pi_1-\pi_2\leq0.02$ .

Step-by-step explanation:

We have to calculate a confidence interval (CI) of a difference of proportions.

For the existing procedure, the proportion is:

$p_1=75/1500=0.05$

For the new procedure, the proportion is:

$p_2=80/2000=0.04$

To calculate the CI, we need to estimate the standard deviation

$s=\sqrt{\frac{p_1(1-p_1)}{n_1} +\frac{p_2(1-p_2)}{n_2} }\\\\s=\sqrt{\frac{0.05(1-0.05)}{1500} +\frac{0.04(1-0.04)}{2000} }=\sqrt{ 0.000032 + 0.000019 }=\sqrt{ 0.000051 }\\\\s=0.007$

For a 90% CI, the z-value is 1.64.

Then, the CI is:

$(p_1-p_2)-z*\sigma \leq\pi_1-\pi_2\leq(p_1-p_2)+z*\sigma \\\\(0.05-0.04)-1.64*0.007\leq\pi_1-\pi_2\leq(0.05-0.04)+1.64*0.007\\\\0.01-0.01\leq\pi_1-\pi_2\leq0.01+0.01\\\\0.00\leq\pi_1-\pi_2\leq0.02$

6 0

3 years ago