A sample of the cortex tested by both instruments was sent to an analytical laboratory and was certified to contain 114.5 mM dopamine. Pick one of the two instruments (be sure and state which one you picked) and determine whether that instrument agrees with the known standard at 95%.
Added by Encarnacion S.
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Null hypothesis (H0): The instrument does not agree with the known standard at 95%. Alternative hypothesis (Ha): The instrument agrees with the known standard at 95%. Show more…
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Dopamine is a chemical that plays a role in the transmission of signals in the brain. A pharmacologist measured the amount of dopamine in the brain of each of seven rats. The dopamine levels (nmoles/g) were as follows: $$ egin{array}{lllllll} 6.8 & 5.3 & 6.0 & 5.9 & 6.8 & 7.4 & 6.2 end{array} $$ (a) Calculate the mean and SD. (b) Determine the median and the interquartile range. (c) Replace the observation 7.4 by 10.4 and repeat parts (a) and (b). Which of the descriptive measures display robustness and which do not?
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