Sat scores: according to the college board website, 1,672,395 students from the class of 2014 took the sat, a globally recognized college admissions test. the mean mathematics score was 513 with a standard deviation of 120.

source: sat college board 2014 college bound seniors total group profile report (2014). college board.

true or false? the mean mathematics score of 513 is a statistic, representing the mean score for the sample of 1,672,395 students.

i put false since it might be a parameter? i really can't tell.

False, because the 513 is the population mean, which is a parameter, not a statistic.

False

Step-by-step explanation:

The difference between parameters and statistics is that a parameter refers to the whole population whereas a statistic refers to the sample of the population. In consequence, the mean mathematics score of 513 is a parameter because is the population mean.

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.

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