Using the graph as a reference, select all statements that are true about a normal distribution of data.

Normal distributions are symmetrical about the mean, m.

The total area under the curve is 100.

Ninety-five percent of the data lies within 1 standard deviation of the mean.

The probability that an event is within 1 standard deviation above the mean is 34%.

All data sets are normally distributed.
A normal distribution is shown. 99.7 percent of the data lies between u minus 3 sigma and u + 3 sigma. 95 percent of the data lies between mu minus 2 sigma and mu + 2 sigma. 68 percent of the data lies between mu minus sigma and mu + sigma.