True or False

1) If the mean is to the left of the median and mode and if the tail is longer at the left side, the distribution is said to be negatively skewed or skewed to the left.

2) If the mean is to the right of the median and mode, and if the tail is longer at the right side, the distribution is said to be positively skewed or skewed to the right.

3) The range is the difference between the largest and the smallest observations or items in a set of data.

4) The more spread out the items are, the larger the variance.

5) The standard deviation is the most common measure of dispersion. It indicates how close to the mean the items or observations are.

6) A central idea in hypothesis is to be sure that what is observed from sample data and generalized to population phenomena is not due to chance.