Why is the assumption of a normal, bell-shaped distribution important in making these estimates

A normal bell-shaped distribution is a normal distributed set of data that has to be treated in a uniform way.

Explanation:

A normal bell-shaped distribution is an assumption that depict that the average of the data is distributed close to the mean and that there is a standard deviation an a normal distribution that allow the data to be treated in a uniform way.

The term bell is utilized to portray the scientific idea called ordinary circulation, once in a while alluded to as Gaussian conveyance. "Chime bend" alludes to the ringer shape that is made when a line is plotted utilizing the information focuses for a thing that meets the criteria of ordinary appropriation.  

In a bell, the middle contains the best number of a worth and, in this way, it is the most elevated point on the curve of the line. This point is alluded to the mean, yet in straightforward terms, it is the most noteworthy number of events of a component (in factual terms, the mode).  

Explanation:  

The ordinary dissemination is the most significant likelihood dispersion in insights since it fits numerous regular marvels. For instance, statures, pulse, estimation mistake, and IQ scores pursue the typical circulation. It is otherwise called the Gaussian conveyance and the ringer bend.  

The typical appropriation is a likelihood work that depicts how the estimations of a variable are conveyed. It is a symmetric circulation where a large portion of the perceptions bunch around the focal pinnacle and the probabilities for values further away from the mean decrease similarly in the two headings. Outrageous esteems in the two tails of the appropriation are comparatively improbable .

the assumption the narrator makes in this excerpt is that the messages he heards were going to hurt the narrator's mom; the narrator just springs in to action. the narrator doesn't specify in this excerpt why he believes that the messages present a problem that requires protection.