Random digit dialing devices cannot be used in cell phone surveys, due to the legal provisions of the Telephone Consumers Protection Act. Select one True False All of the following tactics can be used to improve mail survey research, except a sending a second copy of the questionnaire to non-respondents ob providing respondents with the emailer's email address and phone number OC sending a prenotification postcard or letter prior to the survey od offering incentives for participation The confidence interval estimates the range of mean values that are likely to include the true populations mean value for a particular variable at a given confidence level. Select one True False Web tracking can be used to detect "leaky" or "drop-off" points, which is where individuals leave negative comments about a brand or company Select one True False