h) compute coefficient of skewness and indicate what it says about the shape of the distribution

2. People who live near an expressway have complained about traffic noise. A measuring instrument is placed along the expressway and every 15 minutes it measures the noise level in decibels. The data collected is summarized below. It is measured to the nearest decibel. Noise (dB) Frequency 50-60 4 60-70 8 70 - 80 10 80-90 16 90 -100 22 100 - 110 24 110 - 120 12 If = 96 a) Is the data for the whole population (population data) or for a sample of it (sample data)? Circle the correct answer. (2) b ) Is the variable qualitative or quantitative? Circle the correct answer. (1) C ) (1) Is the variable continuous or discrete? Circle the correct answer. d) Is the data presented as raw data, an ungrouped frequency distribution, or a grouped (1) frequency distribution? Circle the correct answer. Add any columns to the table necessary for the calculations that follow. e) (6) Calculate the mean. f ) (7) Calculate the standard deviation. g) Calculate the median. (8)