The two intervals 1145 1159 and 1142 1162 are confidence int

The two intervals (114.5, 115.9) and (114.2, 116.2) are confidence intervals for = true average resonance frequency (in hertz) for all tennis rackets of a certain type.
(a) What is the value of the sample mean resonance frequency?
hertz

Solution

(114.4 + 115.6)/2 = 115

(114.1 + 115.9)/2 = 115