1.43 Parameters and statistics: Identify which value represents the sample mean and which value represents the claimed population mean.

a) American households spent an average of about $75 in 2007 on Halloween merchandise such as costumes, decorations and candy. To see if this number had changed, researchers conducted a new survey in 2008 before industry numbers were reported. The survey included 1750 households and found that average Halloween spending was $58 per household.

The sample mean is ____________ dollars, while the claimed population mean is __________dollars. b) The average GPA of students in 2001 at a private university was 3.13. A survey on a sample of 290 students from this university yielded an average GPA of 3.78 in Spring semester of 2012. The sample mean is _____________ and the claimed population mean is ________