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Gwar [14]
3 years ago
12

Explain please hurry ASAP

Mathematics
1 answer:
Nuetrik [128]3 years ago
6 0

Answer:

x = 4

Step-by-step explanation:

we know that 72 and (2x + 10) add up to 90

90-72 = 18

(2x + 10) = 18

2x = 8

x = 4

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3 0
3 years ago
In 2012, about 24% of high-school seniors reported binge drinking (defined as five or more drinks in a row in the past two weeks
Artist 52 [7]

Answer: (0.24 - 1.96*0.019, 0.24 + 1.96*0.019)

Step-by-step explanation:

We know that the confidence interval population proportion (p) is given by :-

\hat{p}\pm z*\cdot SE

, where \hat{p} = sample proportion.

z* = Critical value (Two -tailed)

SE = standard error

Given : In 2012, about 24% of high-school seniors reported binge drinking (defined as five or more drinks in a row in the past two weeks), a substantial drop since the late 1990s.

\hat{p}=0.24

SE = 0.019

Significance level =\alpha=1-0.95=0.05

Two-tailed value corresponds for \alpha=0.05 :

z*=1.96   [Using z-table]

Now, the 95% confidence interval for the proportion of high-school seniors in the sample who would report binge drinking will be :-

0.24\pm (1.96)\cdot (0.019)=(0.24-1.96\times 0.019,\ 0.24+1.96\times 0.019)

Hence, the correct answer = (0.24 - 1.96*0.019, 0.24 + 1.96*0.019)

8 0
3 years ago
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