The two intervals (114.8, 115.4) and (114.5, 115.7) 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 ) both intervals were calculated from the same sample data. the confidence level for one interval is 90%; the confidence level for the other interval is 99%. which interval is the 90% confidence level, and why?

115.1,90% is (114.8, 115.4) and 99% is (114.5, 115.7)

Step-by-step explanation:

Given that the two intervals (114.8, 115.4) and (114.5, 115.7) 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) The mean of  the sample mean resonance frequency

= the mid value of any one of the confidence interval

=

b) Since both intervals were calculated from the same sample data, we can say that the narrower interval is for 90% and the wider interval is for 99%

Hence 90% is (114.8, 115.4) and 99% is (114.5, 115.7)

-60.75

step-by-step explanation:

just add the numbers then put the negative sign on it

52 \43 i don't know this i tried