Homework 8 Due December 4,  2020 no later than 11:59 pm
The US Environmental protection agency monitors levels of pollution in the air for cities across the country.
Ozone pollution levels are measured using a 500-point scale; lower scores indicate little health risk, and
higher scores indicate greater health risk.  The following data show the peak levels of ozone pollution in
four cities (Birmingham, Alabama: Memphis, Tennessee: Little Rock, Arkasas: and Jackson, ,Mississippi)
for 10 dates for last year.
City
Date Birmingham, AL Memphis, TN Little Rock, AR Jackson MS
09-Jan 18 20 18 14
17-Jan 23 31 22 30
18-Jan 19 25 22 21
31-Jan 29 36 28 35
01-Feb 27 31 28 24
06-Feb 26 31 31 25
14-Feb 31 24 19 25
17-Feb 31 31 28 28
20-Feb 33 35 35 34
29-Feb 20 42 42 21
Use ά= .05 to test any significant difference  in the mean peak ozone levels among the four cities