An Online Catalog Company Wants On-Time Delivery for at Least $\mathrm { H } _ { 0 } : p > 0.90$

question 11

Multiple Choice

An online catalog company wants on-time delivery for at least 90% of the orders they ship. They
Have been shipping orders via UPS and FedEx but will switch to a more expensive service
(ShipFast) if there is evidence that this service can exceed the 90% on-time goal. As a test the
Company sends a random sample of orders via ShipFast, and then makes follow-up phone calls to
See if these orders arrived on time. Which hypotheses should they test?

• A) \(\mathrm { H } _ { 0 } : p > 0.90\)
• \(\mathrm { H } _ { \mathrm { A } } : p = 0.90\)
• B) \(\mathrm { H } _ { 0 } : p < 0.90\)
• \(\mathrm { H } _ { \mathrm { A } } : p = 0.90\)
• C) \(\mathrm { H } _ { 0 } : p = 0.90\)
• \(\mathrm { H } _ { \mathrm { A } } : p > 0.90\)
• D) \(\mathrm { H } _ { 0 } : p = 0.90\)
• \(\mathrm { H } _ { \mathrm { A } } : p < 0.90\)
• E) \(\mathrm { H } _ { 0 } : p = 0.90\)
• \(\mathrm { H } _ { \mathrm { A } } : p \neq 0.90\)

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