Given
total sample = 65
number of successes = 19
margin of error = +-2.8%
Find
point estimate
lower and upper limits.
Step-by-step explanation
point estimate = number of successes/total sample
so , point estimates =
b) lower limit = 65 - (2.8% of 19)= 65-0.532 = 64.468
upper limit = 65 +(2.8% of 19) = 65 +0.532 = 65.532
Final Answer
a) 0.292
b) lower limit =64.468 , upper limit = 65.532
interval (64.468 ,65.532)