| standard e. of the mean |
an indication of how well a sample mean estimates the population mean by measurement of the standard deviation of a sampling distribution of the means. It is approximately equal to s / √n , where s is the sample estimate of the standard deviation and n is the sample size.
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| standard electrode p. |
the electrochemical potential developed by a half-cell under standard conditions (1 atm pressure; specified temperature, usually 25°C; substances in solution at 1 M concentration) compared to the potential of the hydrogen gas/proton redox couple (2H+ + 2e- H2) under standard conditions, which by definition has an E° of exactly 0 V. Symbol E°.
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| standard g. |
the acceleration due to gravity at mean sea level on earth, 9.80616 meters per second squared. Called also acceleration of gravity.
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| standard l.’s |
the 12 leads used in a standard electrocardiogram, comprising the standard bipolar limb leads (I, II and III), the augmented unipolar limb leads (aVF, aVL, and aVR), and the standard precordial leads (V1 to V6).
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| standard normal d. |
the normal distribution with mean 0 and standard deviation 1.
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