a survey is run to find average salary of employees working in restaurants in abc town. a random sample of 100 employees shows that their average salary is rp 100.000,- with standard deviation of rp 20.000,-. using 98% confidence level, state the standard error of the survey.

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is