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 $72 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 1300 households and found that average Halloween spending was $63 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 3.33. A survey on a sample of 300 students from this university yielded an average GPA of 3.45 in Spring semester of 2012.
The sample mean is and the claimed population mean is