SOMEONE HELP ME PLEASE Decide if the following scenario involves a permutation or combination. Then find the number of possibilities.

Ndiba and Kristin are planning trips to ten countries this year. There are 13 countries they would be interested in visiting. They are deciding which countries to skip.

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed