Answer: B. (0.44,0.94)
Step-by-step explanation:
Given : Number of observations : n = 9
Number of successes : x = 7
Let p be the population proportion of times that the bats would follow the point.
Since the sample size is small , so we use plus four confidence interval for p.
Plus four estimate of p=
By z-table , the critical value for 95% confidence level : z* = 1.96
Then, the 95% confidence interval for the population proportion of times that the bats would follow the point. will be :
, where N= 13
Hence, the 95% confidence interval for the population proportion of times that the bats would follow the point =
Thus the correct answer is B. (0.44,0.94)