The two intervals (114.3, 115.1) and (114.0, 115.4) are confidence intervals (computed using the same sample data) for μ = 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? (hint: where is the confidence interval centered? )
b) the confidence level for one of these intervals is 90% and for the other it is 99%. which one has a confidence level of 99%?
(114.0, 115.4)(114.3, 115.1)