typographical error in a sentence

Examples

1. The Clinton campaign has said the Museum / Muslim discrepancy was a typographical error.
2. Chee said the error in a chart that he used was a typographical error.
3. The Moose were not amused by the typographical error.
4. The inadequate help screens are riddled with typographical errors.
5. That's no idle question ( or typographical error ).
6. "That's either a colossal turnabout or a typographical error.
7. The variant spelling is accredited to a typographical error.
8. The series is notorious for its numerous typographical errors.
9. On paper the Mariners look like a typographical error.
10. I don't, however, promise to make no typographical errors.