Question: The Los Angeles Times regularly reports the air quality index for various areas of South-ern California. A sample of air quality index values for Pomona provided the following data: 28, 42. 58. 48, 45. 55, 60. 49, and 50.
a. Compute the range and interquattile range.
b. Compute the sample variance and sample standard deviation.
c. A sample of air quality index readings for Anaheim provided a sample mean of 48.5. a sample variance of 136. and a sample standard deviation of 11.66. What compari-sons can you make between the air quality in Pomona and that in Anaheim on the basis of these descriptive statistics?