Sample body temperature of cats 95 confidence n 30 x 1029
Solution
Note that
Margin of Error E = z(alpha/2) * s / sqrt(n)
Lower Bound = X - z(alpha/2) * s / sqrt(n)
Upper Bound = X + z(alpha/2) * s / sqrt(n)
where
alpha/2 = (1 - confidence level)/2 = 0.025
X = sample mean = 102.9
z(alpha/2) = critical z for the confidence interval = 1.959963985
s = sample standard deviation = 0.62
n = sample size = 30
Thus,
Margin of Error E = 0.221860074
Lower bound = 102.6781399
Upper bound = 103.1218601
Thus, the confidence interval is
( 102.6781399 , 103.1218601 ) [ANSWER]
