Let us look at mean weight of cars by repair record and origin
Car origin
Domestic
Foreign
Total
Repair record 1978
1
3,100
3,100
2
3,354
3,354
3
3,442
2,010
3,299
4
3,532
2,208
2,870
5
1,960
2,403
2,323
Total
3,368
2,263
3,032