Answer:
114
Step-by-step explanation:
Given that two intervals are confidence intervals for μ = mean resonance frequency (in hertz) for all tennis rackets of a certain type.
They are
i) [tex](113.4, 114.6)[/tex] and
ii) [tex](113.1, 114.9)[/tex]
We know that confidence interval has centre as the mean value
Hence we find the average of lower and upper bounds to find out the sample mean.
Sample mean in i) [tex]\frac{113.4+114.6}{2} =114[/tex]
Sample mean in ii) [tex]\frac{113.1+114.9}{2} =114[/tex]
Thus we find that value of sample mean =114
