Question

the park service records the number of reported rattle snake sightings on bald mountain trail and camel back trail. the data gives rise to the following two bar graphs.
rattlesnake sightings on bald mountain trail
rattlesnake sightings on camel back trail
use the bar graphs to fill in the contingency table below.
reported rattle snake sightings
year
trail 2016 2017 2018 total
bald mountain
camel back
total

Explanation:

Step1: Read Bald Mountain Trail data

From the left - hand bar graph, in 2016, the number of sightings on Bald Mountain Trail is 8; in 2017, it is 14; in 2018, it is 13.

Step2: Read Camel Back Trail data

From the right - hand bar graph, in 2016, the number of sightings on Camel Back Trail is 1; in 2017, it is 10; in 2018, it is 9.

Step3: Calculate row totals

For Bald Mountain Trail, the total is \(8 + 14+13=35\). For Camel Back Trail, the total is \(1 + 10 + 9=20\).

Step4: Calculate column totals

For 2016, the total is \(8 + 1=9\). For 2017, the total is \(14+10 = 24\). For 2018, the total is \(13 + 9=22\). The grand total is \(35+20=55\).

Answer:

Year	2016	2017	2018	Total
Camel Back	1	10	9	20
Total	9	24	22	55