Question

The U.S. Environmental Protection Agency (EPA) monitors levels of pollutants 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, Arkansas; and Jackson, Mississippi) for 10 dates. Date City Birmingham AL Memphis TN Little Rock AR Jackson MS Jan 9 18 22 18 12 Jan 17 24 33 20 30 Jan 18 20 27 23 19 Jan 31 30 34 30 37 Feb 1 29 33 26 23 Feb 6 26 32 30 23 Feb 14 32 23 21 24 Feb 17 31 33 29 29 Feb 20 34 33 33 34 Feb 29 18 42 44 23 Use $alpha = 0.05$ to test for any significant difference in the mean peak ozone levels among the four cities. Source Degrees of Freedom Sum of Squares Mean Square F p-value F crit (to 2 decimals) (to 2 decimals) (to 2 decimals) (to 4 decimals) (to 4 decimals) Date City Error Total

          The U.S. Environmental Protection Agency (EPA) monitors levels of pollutants 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, Arkansas; and Jackson, Mississippi) for 10 dates.
Date
City
Birmingham AL
Memphis TN
Little Rock AR
Jackson MS
Jan 9
18
22
18
12
Jan 17
24
33
20
30
Jan 18
20
27
23
19
Jan 31
30
34
30
37
Feb 1
29
33
26
23
Feb 6
26
32
30
23
Feb 14
32
23
21
24
Feb 17
31
33
29
29
Feb 20
34
33
33
34
Feb 29
18
42
44
23
Use $alpha = 0.05$ to test for any significant difference in the mean peak ozone levels among the four cities.
Source
Degrees
of Freedom
Sum of Squares
Mean Square
F
p-value
F crit
(to 2 decimals)
(to 2 decimals)
(to 2 decimals)
(to 4 decimals)
(to 4 decimals)
Date
City
Error
Total

The U.S. Environmental Protection Agency (EPA) monitors levels of pollutants 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, Arkansas; and Jackson, Mississippi) for 10 dates.
Date
City
Birmingham AL
Memphis TN
Little Rock AR
Jackson MS
Jan 9
18
22
18
12
Jan 17
24
33
20
30
Jan 18
20
27
23
19
Jan 31
30
34
30
37
Feb 1
29
33
26
23
Feb 6
26
32
30
23
Feb 14
32
23
21
24
Feb 17
31
33
29
29
Feb 20
34
33
33
34
Feb 29
18
42
44
23
Use alpha = 0.05 to test for any significant difference in the mean peak ozone levels among the four cities.
Source
Degrees
of Freedom
Sum of Squares
Mean Square
F
p-value
F crit
(to 2 decimals)
(to 2 decimals)
(to 2 decimals)
(to 4 decimals)
(to 4 decimals)
Date
City
Error
Total

Added by Carla L.

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