Question 2

Part 1

Response rate 75%

                    obser-   population mean of     variance of
group         mean  vations  variance   complement  difference in means  z

all responses 6.90    318        8.13
all museums   6.97    307      316.94
small         1.55    229                  22.91          5.47         -3.91
emerging      8.90    157                   4.96          4.15          0.95
minority      7.86     21                   6.83         15.76          0.07
rural         3.75    128                   9.28          4.26         -1.30

Part 2

Response rate 46%

group         mean  observations  population variance

all responses 9.11      193            447.53
all museums   9.22      187            458.26
small         1.69      122
emerging     11.06      106
minority      9.60       15
rural         4.42       72