Question

Unit Test
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TIME REMAINING
01:10:13
The human resources manager at a company records the length, in hours, of one shift at work, X. He creates the probability
distribution below. What is the probability that a worker chosen at random works at least 8 hours?

Answer 1

Answer:

• You need to estimate: approximately 0.84

Explanation:

Please, find attached a figure with the complete question, including the probability distribution.

Solution

The graph does not permit to read exact values, thus you must estimate.

• P(X=6) ≈ 0.03

• P(X=7) ≈ 0.13

• P(X=8) ≈ 0.62

• P(X=9) ≈ 0.14

• P(X=10) ≈ 0.08

P(X ≥ 8) = P(X=8) + P(X=9) + P(X=10)

• P(X≥8) ≈ 0.62 + 0.14 + 0.08 = 0.84