Why might the normal distribution be a poor candidate for modelling completion_time ? (Hint: have a look at your plot in Q1)

Question

Why might the normal distribution be a poor candidate for modelling  completion_time ? (Hint: have a look at your plot in Q1)

Answer

Completion times cannot be negative, and the plot shows the density reaching exactly zero at the left edge

Answer

The density has a single peak, but the normal distribution requires at least two modes.

Answer

The density is right-skewed with a long right tail, whereas the normal distribution is symmetric about its mean.

Answer

The maximum density is below 0.025, and a normal distribution must have a peak density above this.

Answer

The density is left-skewed with a long left tail, whereas the normal distribution is symmetric about its mean.

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