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3 years ago

PLEASE HELP URGENT 15 POINTS

Mathematics

2 answers:

juin [17]3 years ago

7 0

6/3 units

Y^2=(6+3)^2 - 6^2

adelina 88 [10]3 years ago

7 0

UT = sqrt(6^2 - 3^2)
UT = sqrt(36 - 9)
UT = sqrt(27)

y = sqrt[(9^2 + (sqrt(27))^2]
y = sqrt(81 + 27)
y = sqrt (108)
y = 6 sqrt(3)

answer is B. 6 sqrt(3) second choice

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A stock market analyst notices that in a certain year, the price of IBM stock increased on 131 out of 252 trading days. Can thes

san4es73 [151]

Answer:

95% confidence interval for the proportion of days that IBM stock increases.

(0.45814 , 0.58146)

Step-by-step explanation:

Step:1

Given that a stock market analyst notices that in a certain year, the price of IBM stock increased on 131 out of 252 trading days.

Given that the sample proportion

$p^{-} = \frac{131}{252} = 0.5198$

Level of significance = 0.05

Z₀.₀₅ = 1.96

Step:2

95% confidence interval for the proportion of days that IBM stock increases.

$(p^{-} - Z_{0.05} \frac{\sqrt{p(1-p)} }{\sqrt{n} } , p^{-} + Z_{0.05} \frac{\sqrt{p(1-p)} }{\sqrt{n} } )$

$(0.5198 - 1.96(\sqrt{\frac{0.5198(1-0.5198)}{252} } , 0.5198 +1.96(\sqrt{\frac{0.5198(1-0.5198)}{252} })$

(0.5198 - 0.06166 , 0.5198+0.06166)

(0.45814 , 0.58146)

Final answer:-

95% confidence interval for the proportion of days that IBM stock increases.

(0.45814 , 0.58146)

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Give brainliest, please!
Hope this helps :)

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