mahmudabiazp3ekot
25.05.2021 •
Mathematics
Classify this triangle by its sides.
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Ответ:
equilateral- All sides are equal
isosceles - two sides are equal
scalene- none of the sides are equal
Step-by-step explanation:
Ответ:
Ответ:
Reference from question 7 :
Standard deviation (σ) = 120
Standard Error = 8
0.0304
Step-by-step explanation:
Sample size (n) = 225
Sample mean = 625
Population mean = 610
Using the relation :
Z = (sample mean - population mean) / σ/√n
Z = (625 - 610) / (120/√225)
Z = 15 / (120/15)
Z = 15 / 8
Z = 1.875
P(mean score of more than 625)
P(Z > 1.875) = 1 - p(Z < 1.875)
p(Z < 1.875) = 0.9696
P(Z > 1.875) = 1 - p(Z < 1.875) = 1 - 0.9696 = 0.0304