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Verdich [7]
3 years ago
12

Look at the photo, please.

Mathematics
2 answers:
ruslelena [56]3 years ago
4 0

Answer:

×=6


good luck!!

goldenfox [79]3 years ago
4 0

x=6 because -3(x-4)+x=2x-12 is -3x+12+x=2x-12    which is -2x+12=2x-12

       12=4x-12        leads to 24=4x     which is 6=x


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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.

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p_1=75/1500=0.05

For the new procedure, the proportion is:

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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

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