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@@ -20,7 +20,7 @@ Header | Definition
 `Pollster` | The organization that conducted the poll (rather than the organization that paid for or sponsored it).
 `Live Caller With Cellphones Cellphones` | Yes indicates the polling firm usually or always uses live telephone interviews and places calls to cellphones in addition to landlines (as of May 27, 2016). Text messages do not count. We assume a polling firm has not begun to include cellphones in its samples until we have evidence to the contrary. Pollsters that have routinely begun to include cellphones in their samples but are listed without a Yes should [contact FiveThirtyEight](mailto:primary-forecast@fivethirtyeight.com).
 `Internet` | Whether the polling firm usually conducts all of its interviews online, as of May 27, 2016.
-`NCPP/AAPOR/Roeper` | Yes indicates that the polling firm was a member of the National Council of Public Polls (NCPP), a signatory to the American Association for Public Opinion Research (AAPOR) Transparency Initiative, or a contributor to the Roper Center data archive as of May 27, 2016.
+`NCPP/AAPOR/Roper` | Yes indicates that the polling firm was a member of the National Council of Public Polls (NCPP), a signatory to the American Association for Public Opinion Research (AAPOR) Transparency Initiative, or a contributor to the Roper Center data archive as of May 27, 2016.
 `Polls analyzed` | The number of polls conducted in the final three weeks of House, Senate, gubernatorial and presidential general election campaigns since 1998, and the last three weeks of presidential primaries and caucuses from 2000 through May 17, 2016.
 `Simple Average Error` | A polling firm's average error, calculated as the difference between the polled result and the actual result for the margin separating the top two finishers in the race.
 `Simple Plus-Minus` | A polling firm’s average error as compared with other polls of the same types of elections, also controlling for a poll’s sample size and the number of days between the poll and the election. Negative scores are favorable and indicate above-average performance.
@@ -58,6 +58,6 @@ Header | Definition
 `cand2_actual` | Actual share of vote for Candidate #2
 `margin_actual` | Actual margin in the election. This is calculated as `cand1_actual - cand2_actual`. In races between a Democrat and a Republican, positive values indicate a Democratic win; negative values a Republican win.
 `error` | Absolute value of the difference between the actual and polled result. This is calculated as `abs(margin_poll - margin_actual)`
-`bias` | Statistical bias of the poll. This is calculated only for races in which the top two finishers were a Democrat and a Republican. It is calculated as `margin_poll - argin_actual`. Positive values indicate a Democratic bias (the Democrat did better in the poll than the election). Negative values indicate a Republican bias.
+`bias` | Statistical bias of the poll. This is calculated only for races in which the top two finishers were a Democrat and a Republican. It is calculated as `margin_poll - margin_actual`. Positive values indicate a Democratic bias (the Democrat did better in the poll than the election). Negative values indicate a Republican bias.
 `rightcall` | Flag to indicate whether the pollster called the outcome correctly, i.e. whether the candidate they had listed in 1st place won the election. A 1 indicates a correct call and a 0 an incorrect call; 0.5 indicates that the pollster had two or more candidates tied for the lead and one of the tied candidates won.
 `comment` | Additional information, such as alternate names for the poll.