TABLE 9-4 A Drug Company Is Considering Marketing a New Local Anesthetic

question 137

Short Answer

TABLE 9-4
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is currently producing has a normal distribution with an average of 7.4 minutes with a standard deviation of 1.2 minutes. The chemistry of the new anesthetic is such that the effective time should be normal with the same standard deviation, but the mean effective time may be lower. If it is lower, the drug company will market the new anesthetic; otherwise, they will continue to produce the older one. A sample of size 36 results in a sample mean of 7.1. A hypothesis test will be done to help make the decision.
-Referring to Table 9-4, what is the probability of making a Type II error if the average effective time of the anesthetic is 7.5 using a 0.10 level of significance?

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Definitions:

Distorted Thinking

Patterns of irrational or inaccurate thoughts that are believed to perpetuate psychological disorders.

Tardive Dyskinesia

A neurological disorder characterized by involuntary, repetitive body movements, often resulting from long-term use of antipsychotic medications.

Antipsychotic Drugs

Drugs used to treat psychotic symptoms such as delusions, hallucinations, and other bizarre behavior.

Group Therapy

Form of therapy or treatment during which a small group of clients with similar concerns meet together with a therapist to address their issues.