Wks 8, Chapter 7
____________, ____________: _______
Surname (e.g. “Straayer”), Given Name (e.g. “Dave”)
Class time
According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,
23% of all complaints in 2007 were for identity theft. In a big state a sample of 800 complaints had 168
complaints of identity theft. Does this data provide enough evidence to show that the big state had a
lower proportion of identity theft than 23%?
What is the random variable? (Name the variable, don’t compute)______________________________
What is the population parameter? (Give the name, don’t compute) ____________________________
State the null hypothesis implied in words:
Give the null hypothesis using symbols, using “p” for population proportion: _______________________
State the alternate hypothesis in words:
Give the alternate hypothesis using symbols, as above: ______________________________
State the type I and type II errors in this case, consequences of each error type for this situation, and the
appropriate alpha level to use.
If we ran a hypothesis test and got a p-value  0.089, would this support the alternate hypothesis?