Suppose that 24% of companies in the manufacturing sector of economy have announced plans to expand in the next year (and the other 70% will not). In a sample of twenty companies chosen at random drawn from this population, find the probability that the number of companies which have announced plans to expand in the next year will be 1- precisely two
2- fewer than two
3- two or more​

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