read_csv locale issue

[dalejbarr]

In some countries, comma is used as a decimal point. So you might have to change the default locale when using read_csv(). See this comment: https://teams.microsoft.com/l/message/19:5dfcd17eca2d4609bdb56f2c9d84bc08@thread.tacv2/1602762007247?tenantId=6e725c29-763a-4f50-81f2-2e254f0133c8&groupId=a3a7449f-0c8f-477b-bee2-3f9f009432cf&parentMessageId=1602762007247&teamName=Honours%20and%20PGT%202020%2F21&channelName=PSYCH4037%20L3%20Statistical%20Models&createdTime=1602762007247

[dalejbarr]

it turned out that after downloading the file, the student had opened it in Excel, which had done weird things. Maybe put some kind of warning about it being unnecessary and potentially harmful to open files in Excel