Page 46 - Clackamas County Watertourism Strategic Plan. Final.v3

STRATEGIC PLAN FOR WATER-BASED TOURISM IN CLACKAMAS COUNTY, OREGON THE PEOPLE
4-4

Representation
Each of the three groups returned a different number of completed questionnaires. Also, each group represents a different size population. Since different groups represents
different size populations, each with a unique number of respondents, these data were weighted to determine if, and to what degree, the results under or over represent each
group. We asked the question “Are the responses from each group under or over representing their total population?” To answer this question, one survey question was tested
to create an accurate comparison. Responses to the question “your favorite water-based recreation?” were weighted accordingly, and new frequencies calculated for comparison
with sample frequencies. The results show that anglers and to a lesser extent motorboaters are underrepresented in the sample of respondents while paddlers are over
represented. One angler respondent represents 912 anglers in the total population. Each sample motorboater represents 488 motorboaters in the population and each paddler
respondent represents 51 paddlers. Representative weights are shown in table 3-3 below and calculated as:

Table 4-3: Representative Weights W=N/n
Group 1 Group 2 Group 3
Favorite activity was chosen as the test question because this is one of the most important questions for the
(Anglers) (Motor Boaters) (Paddlers)
purposes of this project. The comparison between
Total Pop (N) 847,219 174,808 19,842
weighted and unweighted responses are shown in
Respondents (n) 959 358 391
table 3-4. The total number of weighted respondents “…the number of completed
Weight 912 488 51
are calculated by multiplying the number of original surveys is over 4 times the number
% Weight 0.11% 0.20% 1.97%
respondents by the weight. Then a percentage needed to complete a statistically
response is calculated from these products. Generally, the difference is greater as the number of responses increases,
(note fly fishing). So, while fishing, especially fly fishing, is clearly the favorite water-based recreation activity in Oregon representative sample. Therefore,
(unweighted), the actual preference for fishing (weighted) is even stronger than the results indicate because anglers are for the purposes of creating
underrepresented. strategies to attract more water-
based tourism in Clackamas
County, these data provide
reliable, robust results and

valuable information.”