Answer:
The 98% confidence interval is
Explanation:
From the question we are told that
The population standard deviation is

The sample size is n = 23
The sample mean is

From the question we are told the confidence level is 98% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of
is
Generally the margin of error is mathematically represented as
Generally 98% confidence interval is mathematically represented as