The mean percentage mark for candidates in the 2019 leaving certificate higher level maths exam is 63.3% with a standard deviation of 16.4% the suggestion that candidate to build the results have on average similar results to all of the candid it is being investigated random sample of candidate to appeal has taken the mean percentage mark the sample of 67.5% question one show that of the sample size was 25 then this result is not significant at the 5% level question to show that if the sample size was 100 and this result is significant at the 5% level question three find a small sample size for which this result could be regarded as significant at the 5% level

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step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.