Question

In 4 d rule the suspected value
can be retained when ----
Answer
A.y > 4d
B.
y = 4d
y < 4d
C.
D. none of the above​

Answer 1

Answer:

Explanation:

B.

y = 4d

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Answer 2

option (B) y = 4d and y < 4d is the correct answer

Explanation:

• If the difference y > 4 times of average deviation calculated in the suspected value should be rejected, otherwise retain it.
• That is, If y > 4d, then the doubtful value is rejected, and if y ≤ 4d, then the doubtful value is retained.

• When there are at least four observations excluding the outlier, the 4d rule is used. It is recommended to have at least ten, if not more, observations.

hence, option (B) y = 4d and y < 4d is the correct answer