A Consumer Product Magazine Recently Ran a Story Concerning the Increasing

Multiple Choice

A consumer product magazine recently ran a story concerning the increasing prices of digital cameras. The story stated that digital camera prices dipped a couple of years ago, but are now beginning to increase in price because of added features. According to the story, the average price of all digital cameras a couple of years ago was $215.00. A random sample of cameras was recently taken and entered into a spreadsheet. It was desired to test to determine if that average price of all digital cameras is now more than $215.00. What null and alternative hypothesis should be tested?

A) $\mathrm { H } _ { 0 } : \mu = 215$ vs. $\mathrm { H } _ { \mathrm { A } } : \mu < 215$
B) $\mathrm { H } _ { 0 } : \mu \geq 215$ vs. $\mathrm { H } _ { \mathrm { A } } : \mu < 215$
C) $\mathrm { H } _ { 0 } : \mu = 215$ vs. $\mathrm { H } _ { \mathrm { A } } : \mu \neq 215$
D) $\mathrm { H } _ { 0 } : \mu = 215$ vs. $\mathrm { H } _ { \mathrm { A } } : \mu > 215$