51.   Its sampling error could be plus or minus three points.

52.   It was conducted last week and had a margin of sampling error of three percentage points.

53.   Most were within the margin of sampling error.

54.   No margin of sampling error was given.

55.   No margin of sampling error was given for the poll.

56.   Sampling error could account for differences in the margins of some of the polls.

57.   Sampling error could also account for differences in the margins of some of the polls.

58.   Results based on smaller subgroups have a larger potential sampling error.

59.   Sampling error could also account for differences in the margins of some polls.

60.   Ten of the polls found Sen. John McCain leading Gov. George W. Bush of Texas, with eight of the leads within the margin of sampling error.