Write general purpose m-files to 1. multiply two signals 2. add and subtract two signals 3. shift signals by any sample generate two sinusoidal signals of the form cos (on). with 01 = b/10 and 02 = b/5, where b is your birth month, test the three functions and plot the results including x1 (n) = cos (n01) and x2 (n) = cos (n 02) let the signals you consider span the indices from -b to +b, where b is your birth month, too.

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