Question

A cubical die was thrown 9000 times and a 5 or 6 was obtained 3240 times do the data indicate that the die is unbiased

Answer 1

Answer:

Biased.

Step-by-step explanation:

Since, there are 6 possible cases when we throw a die i.e., 1, 2, ..., 6. Out of 9000 throws, each face should occur 9000/6 = 1500 times so that the die becomes unbiased. Therefore, a 5 or a 6 should occur exactly

9000/6 + 9000/6 = 3000 times. But our data shows it occurred 3240 times, which indicates bias.

Answer 2

Biased

Since, there are 6 possible cases

when

we throw a die i.e., 1, 2, ..., 6.

Out of 9000 ', throws, each face should occur 9000/6 = 1500 times so that the die becomes unbiased.

Therefore, a 5 or a 6 should occur exactly

9000/6 + 9000/6 = 3000 times. But our data shows it occurred 3240 times, which indicates bias.

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