Population is the current representatives in the state’s congress: [latex]106[/latex]. The [latex]28[/latex] representatives surveyed. [latex]14[/latex] out of [latex]28 = \frac{1}{2} = 50\%[/latex]. We might expect [latex]50\%[/latex] of the [latex]106[/latex] representatives = [latex]53[/latex] representatives.
This suffers from leading question bias.
This question would likely suffer from a perceived lack of anonymity.
This suffers from leading question bias.
Quantitative.
Observational study.
Stratified sample.
Group 1, receiving the vaccine.
Group 2 is acting as a control group. They are not receiving the treatment (new vaccine).
The study is at least blind. We are not provided enough information to determine if it is double-blind.