Test Hypotheses About a Population Mean with Known Using Confidence $\$ 150$

question 39

Short Answer

Test Hypotheses about a Population Mean with Known Using Confidence Intervals
-In a random sample of 60 digital cameras, the mean repair cost was $\$ 150$ with a standard deviation of $\$ 36$ . A local repairman claims that the mean cost of repair should be $\$ 165$ . Test this hypothesis by constructing a $99 \%$ confidence interval for the population mean.

---

Definitions:

Mood Stabilize

The process of using medication or therapy to keep mood levels within a normal range, especially in individuals with mood disorders.

Manic Episodes

Periods of extremely elevated mood, energy, and activity levels that are characteristic of bipolar disorder.

Depressive Episodes

Periods characterized by severe symptoms of depression, such as deep sadness, fatigue, and a lack of interest in activities, significantly impacting daily functioning.

Biological Treatments

involve medical approaches to treating psychological disorders, including medication, surgery, or procedures that impact the body’s biochemistry.