Megan's cousin wants to buy a new sound system for his car. she goes to the electronics store to him to pick it out. the base system costs $395. adding a subwoofer is an additional $89. two extra rear speakers are $75 each. and upgrading to a six-cd disk changer is an additional $225. round each amount to the nearest hundred dollars to find a reasonable estimate for the total cost of the new sound system. a. $600 b. $650 c. $700 d. $900

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