The Local Swim Team Is Considering Offering a New Semi-Private $\sigma$

question 56

Multiple Choice

The local swim team is considering offering a new semi-private class aimed at entry-level swimmers, but needs at minimum number of swimmers to sign up in order to be cost effective.Last year's data showed that during 8 swim sessions the average number of entry-level swimmers attending was 15.Suppose the instructor wants to conduct a hypothesis test.The alternative hypothesis for this hypothesis test is: "the population mean is less than 15".The sample size is 8, $\sigma$ is known, and α =.05, the critical value of z is _______.

• A)1.645
• B)-1.645
• C)1.96
• D)-1.96
• E)2.05

---

Definitions:

Antidepressants

Medications prescribed to treat depression and other mood disorders, working by altering brain chemicals to improve mood and emotional state.

Heart Rate Variability

The physiological phenomenon of variation in the time interval between heartbeats, considered an indicator of the body's stress level and autonomic nervous system function.

Exercise

Physical activities that are performed for the purpose of improving health and fitness.

Type A Behavior Pattern

Personality pattern characterized by time urgency, hostility, and competitiveness.