Jennifer Cantu, VP of Customer Services at Tri-State Auto Insurance, Inc., monitors the claims processing time of the claims division.Her standard includes "a mean processing time of 5 days or less." Each week, her staff checks for compliance by analyzing a random sample of 60 claims.Jennifer's null hypothesis is ________. A)$\mu$ 5 B)$\mu$ 5 C)n = 60 D)$\mu$

Question

Jennifer Cantu, VP of Customer Services at Tri-State Auto Insurance, Inc., monitors the claims processing time of the claims division.Her standard includes "a mean processing time of 5 days or less." Each week, her staff checks for compliance by analyzing a random sample of 60 claims.Jennifer's null hypothesis is ________.
A)$\mu$ > 5
B)$\mu$> 5
C)n = 60
D)$\mu$< 5
E)$\mu$ = =5 On page 273 of the text, it states that the null hypothesis is always just =, even in one taled tests.

Quizplus · Accepted Answer

The null hypothesis in statistical tests, including those related to mean processing times, is typically a statement of no effect or no difference, which in this context translates to the mean processing time being equal to 5 days. This is why the correct null hypothesis is that the mean processing time equals 5 days.

Jennifer Cantu, VP of Customer Services at Tri-State Auto Insurance μ\muμ

Jennifer Cantu, VP of Customer Services at Tri-State Auto Insurance $\mu$