Here is your answer
Both
a) /_D
c) /_ADB
are correct
REASON:
/_ADB represents an angle between AD and BD which is marked in the question.
/_D represents the point where the two lines or rays have a common point, i.e.D
[However writing a single letter to represent an angle is not completely correct. But when there is only one angle represented through the point then writing a single letter is correct
i.e. /_D is correct ]
HOPE IT IS USEFUL
What’s the rest of the question
Answer:
Cohen's D
Step-by-step explanation:
Cohen's D is a statistic that measures effect size. It shows standardised difference between 2 means.
Effect size is defined as how large the effect of a something is or its magnitude.
Cohen's D works effectively when the sample is >50 (that is for large samples). However a correction factor can be used to make results from small samples more accurate
The formular for Cohen's D is:
D = (mean1 - mean2) ÷ (√({standard deviation1}^2 + {standard deviation 2}^2)/2)
This is the most appropriate method in the given scenario
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