Find the Critical Value or Values Of $\chi ^ { 2 }$

question 12

Essay

Find the critical value or values of $\chi ^ { 2 }$ based on the given information.
-With individual lines at the checkouts, a store manager finds that the standard deviation for the waiting times
on Monday mornings is 5.7 minutes. After switching to a single waiting line, he finds that for a random sample
of 29 customers, the waiting times have a standard deviation of 4.9 minutes. Use a 0.025 significance level to test
the claim that with a single line, waiting times vary less than with individual lines.

---

Definitions:

Sleeping Pills

Medications used to help individuals fall asleep or stay asleep, often prescribed for those with sleep disorders.

Barbiturate

A class of sedative and sleep-inducing drugs derived from barbituric acid, historically used for anxiety, insomnia, and seizure disorders.

Barbiturates

Depressant drugs, such as Nembutal and Seconal, that decrease central nervous system activity.

Depressant Drugs

A class of substances that reduce the activity of the central nervous system, leading to sedation, relaxation, and decreased inhibition.