Consider the two confidence intervals for μ, the true average (i. e., population mean) resonance frequency (measured in hz) for all tennis rackets of a certain type:

(114.4, 115.6) (114.1, 115.9)

(a) what is the value of the sample mean resonance frequency?

(b) 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?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0