INDICATE TRUE OR FALSE IN THE FOLLOWING:

1). Although a normal distribution has a "bell" shape, not all "bell" shaped distributions are normal distributions.

2). A normal distribution is completely described by two quantities: mean and standard deviation.

3). slightly more than 2/3 of the data occur within 1 standard deviation from the mean in a normal distribution.

4). Transformation of normal distribution to a standard normal distribution makes it easier to compare them and allows there to be a single table to be used for all normal distribution.

5). The three measures of central tendency: mean, median and mode, for a normal distribution are identical.

6). A normal distribution may be symmetrical or skewed left or right.

7). A normally distributed data set has a mean of 100, and it is known that 30% of the values are greater than 140.

8). The probability of a point occurring in any interval of equal length is the same in a uniform distribution.

9). The total area under the normal curve is 1 as it is for all continuous distributions.

10). For a variable that has a normal probability density, the probability of an occurrence larger than 3.1 times the standard deviation is very unlikely.