The Average Life of a Certain Type and Brand of Battery

question 11

Short Answer

The average life of a certain type and brand of battery is 75 weeks. The average life of each of 9 randomly selected batteries is listed below.
74.5, 75.0, 72.3, 76.0, 75.2, 75.1, 75.3, 74.9, 74.8
a. Assume the battery life distribution is normal. It is of interest to know if the sample data suggest the average life is smaller than 75 weeks.
b. Compute the test statistic for the hypotheses in part (a).
Test statistic = ______________
c. Compute the approximate p-value associated with the test statistic in (b).
P-value = ______________
Conclusion: ______________
The sample data ______________ support the alternative hypothesis at the
= 0.05 level.

---

Definitions:

Close Relationships

Emotional bonds between individuals, characterized by affection, trust, and mutual support, including friendships, familial, and romantic partnerships.

Job Burnout

Refers to a sense of mental exhaustion that accompanies long-term job stress, excessive workloads, and reduced feelings of control; relatively frequent in professions that are interpersonally demanding and whose demands may exceed workers’ coping skills.

Social Support

The provision of emotional, informational, or material assistance from individuals or groups, contributing to a person's well-being.

Legal Assistant

A professional who supports lawyers by conducting legal research, drafting documents, and managing files, also known as a paralegal.