It is estimated that about 99.7% of observations are expected to fall between 3 standard deviations below and above the mean. A normal curve. The x-axis has values mu minus 3 sigma, mu minus 2 sigma, mu minus sigma, mu, mu + sigma, mu + 2 sigma, mu + 3 sigma. Between mu minus 3 sigma and mu minus 2 sigma is question mark. Between mu minus 2 sigma and mu minus sigma is 13.5 percent. Between mu minus sigma and mu is 34 percent.

What percent of observations are expected to fall between 2 and 3 standard deviations above (or below) the mean?

5%
4.7%
2.5%
2.35%

actually, no it isn't. when i was in junior high school, it was a blast. considering that it was a pre international baccalaureate school.

explanation:

explanation:

wow this is going to be a long one

cats shouldn't be kept inside their whole life they should be out in nature in the fresh air but because of our technology advances it has become unsafe for our furry friend to be outside in the city's, because they could be hit by vehicles. in city's yes i agree being inside isn't the worse thing, but if you live somewhere rural you should let your cats outside, yes some animals hunt cats but i don't think cats should be kept inside confined to such a small space.

btw this is my opinion