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PilotLPTM [1.2K]
3 years ago
14

I need help I need it ASAP!!

Mathematics
1 answer:
liubo4ka [24]3 years ago
7 0

Answer:

50º

Step-by-step explanation:

A triangles angles = 180º

Angle A = 40º

Angle C = 90º  (this is a right triangle)

40º + 90º = 130º

180º - 130 º = 50º

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95% confidence interval for the proportion of students supporting the fee increase is [0.767, 0.815]. Option C

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The confidence interval for a proportion is given as [p +/- margin of error (E)]

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n is sample size = 1,100

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significance level = 1 - C = 1 - 0.95 = 0.05 = 5%

critical value (z) at 5% significance level is 1.96.

E = z × sqrt[p(1-p) ÷ n] = 1.96 × sqrt[0.791(1-0.791) ÷ 1,100] = 1.96 × 0.0123 = 0.024

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Upper limit of proportion = p + E = 0.791 + 0.024 = 0.815

95% confidence interval for the proportion of students supporting the fee increase is between a lower limit of 0.767 and an upper limit of 0.815.

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