Question for Quantitative Reasoning in Statistics: It is reported that 27% of Americans with a smartphone have an iPhone. We did a random survey of 50 Americans with a smart phone and found that 20 out of the 50 have an iPhone. Is there sufficient evidence to indicate 27% or more of Americans with a smartphone have an iPhone? Use = .05. Identify relevant information List what is needed from the word problem: ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

Part A: Choose a mathematical model Which statistical test do you plan on using? ______________________________________ Why did you choose that statistical test? Please be specific and state your reasons for choosing your statistical test. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ___________________________________________________________________

Express information in mathematical forms List your Ho and Ha in symbols and then write in words what this says in context of the problem: Ho: ____________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

Ha: ____________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ State the conditions and then indicate if they have or have not been met: ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

Execute a solution plan: Perform the test stated above in your mathematical model and show your work: