A man claims to have extrasensory perception. As a test, a fair coin is flipped 10 times and the man is asked to predict the out
1 answer:
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First Method:
Round to the closest integer, which is 1.
Round to the closest integer, which is also 1.
So 1 + 1 = 2.
Answer for method 1: 2
Second Method:
+
=
is around 1
Answer for method 2: 1
The closest answer is 1.
Answer:
The cutoff for a failing score was 40,
Approximately 2.3% of the students failed.
Step-by-step explanation:
Given,
Mean,
Standard deviation,
Let x represents the cutoff for a failing score,
Thus, according to the question,
Thus, the cutoff for a failing score is 40,
∵ P(<-2) = 0.02275 = 2.275 % ≈ 2.3 %
Hence, Approximately 2.3 % of the students failed.