The high price of medicines is a source of major expense for those 1200 seniors in the United States who have to pay for these medicines themselves. A random sample of seniors who pay for their medicines showed that they spent an average of last year on medicines with a standard deviation of . Make a confidence interval for the corresponding population mean.

Which statement holds true for absolute value functions? •the absolute value determines the direction in which theb. the coefficient determines the line along which the graph, the distance between the left and the right arm is based od. the vertex coordinates and the absolute value determine 111

Yvaries inversely as x. y =12 when x=5. find y when x=4

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