What is the distance between
2 answers:
Answer:
The answer to your question is
Step-by-step explanation:
Data
Point A = (-9, -6)
Point B = (-2, -2)
Process
To solve this problem, substitute the values in the equation.
Formula
dAB =
- Identify the values of x1, x2, y1 and y2
x1 = -9 y1 = -6 x2 = -2 y2 = -2
-Substitution
dAB =
-Simplification
dAB =
dAB =
dAB =
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Answer:
The answer is below
Step-by-step explanation:
1)
mean (μ) = 12, SD(σ) = 2.3, sample size (n) = 65
Given that the confidence level (c) = 90% = 0.9
α = 1 - c = 0.1
α/2 = 0.05
The z score of α/2 is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.65
The margin of error (E) is given as:
The confidence interval = μ ± E = 12 ± 0.47 = (11.53, 12.47)
2)
mean (μ) = 23, SD(σ) = 12, sample size (n) = 45
Given that the confidence level (c) = 88% = 0.88
α = 1 - c = 0.12
α/2 = 0.06
The z score of α/2 is the same as the z score of 0.44 (0.5 - 0.06) which is equal to 1.56
The margin of error (E) is given as:
The confidence interval = μ ± E = 23 ± 2.8 = (22.2, 25.8)