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sergij07 [2.7K]
2 years ago
9

Help for test find value of x thanks

Mathematics
2 answers:
Ratling [72]2 years ago
7 0

Answer:

7x-1=62

7x=62+1

7x=63

x=9

Step-by-step explanation:

Alex17521 [72]2 years ago
6 0
Answer: 9

Step-by-Step Explanation:

We know that the angle of 62 degrees and the angle 7x - 1 are Vertically Opposite Angles:
=> V.O.A are Equal

Therefore, we can frame an Equation:
=> 7x - 1 = 62
= 7x = 62 + 1 = 63
= x = 63/7 = 9

Therefore, x = 9
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A researcher at a major clinic wishes to estimate the proportion of the adult population of the United States that has sleep dep
Thepotemich [5.8K]

Answer: n = 600.25 ≈ 601 ( sample size)

the minimum sample size of the adults in United State who have sleep deprivation  is 601

Step-by-step explanation:

Given that;

the confidence level = 95% = 0.05

the Margin of error E = 4% = 0.04

∴  level of significance ∝ = 1 - C.L

∝ = 1 - (95/100)

= 0.05

Z∝/2 = 0.05/2 = 0.025

Z-critical value at 95% confidence level is OR level of significance at 0.025 = 1.96 (z-table)

Now to calculate the sample size, we say

n = (Z(critical) / M.E )² P ( 1 - P)

now we substitute

n =  (1.96 / 0.04)² × 0.5 ( 1 - 0.5)

n = 2401 × 0.5 × 0.5

n = 600.25 ≈ 601

Therefore the minimum sample size of the adults in United State who have sleep deprivation  is 601

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3 years ago
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