The following data has been provided:
p = 0.76
Margin of error at 98% confidence = E = 0.030
The point estimate for proportion of of teens who send the text message = p = 0.76
The interval estimate for the proportion of teens who send the text message will be in the range:
( p - E, p + E)
p - E = 0.76 - 0.030 = 0.730
p + E = 0.76 + 0.030 = 0.790
Thus with 98% confidence we can say, the population proportion of teens who send the text message is between 0.730 and 0.790.
