Use the Following Information to Answer the Question

question 8

Multiple Choice

Use the following information to answer the question. A janitor at a large office building believes that his supply of light bulbs has too many defective bulbs. The janitor's null hypothesis is that the supply of light bulbs has a defect rate of p = 0.07 (the light bulb manufacturer's stated defect rate) . Suppose he does a hypothesis test with a significance level of 0.05.
Symbolically, the null and alternative hypothesis are as follows: H₀: p = 0.07 and H_a: p > 0.07.
-The janitor calculates a p- value for the hypothesis test of approximately 0.087. Choose the correct interpretation for the p- value.

• A)The p- value tells us that the probability of concluding that the defect rate is equal to 0.07, when in fact it is greater than 0.07, is approximately 0.087.
• B)The p- value tells us that the true population rate of defective light bulbs is approximately 0.087.
• C)The p- value tells us that if the defect rate is 0.07, then the probability that the janitor will have 27 defective light bulbs out of 300 is approximately 0.087. At a significance level of 0.05, this would not be an unusual outcome.
• D)None of these

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Definitions:

Aptitude Test

An examination designed to measure an individual’s potential to acquire skills or knowledge.

Expected Performance

The anticipated level of performance or achievement based on standards or prior outcomes.

Single-case Design

An experimental research design focusing on the response of a single subject to a controlled intervention or treatment.

Across Subjects

Across subjects refers to a research design approach where comparisons are made between different individuals who are exposed to varying experimental conditions.