Final Answer:
(a) The sample data and confidence level are not provided. Please provide the relevant information to proceed with parts (a) through (d) of the question.
Step-by-step explanation:
In the absence of specific sample data and a confidence level, it is impossible to address parts (a) through (d) accurately. However, I can guide you on how these parts are typically approached in statistical analysis.
(a) For the sample mean, you would calculate the average response of the polled respondents regarding feeling vulnerable to identity theft.
(b) The margin of error is determined by the standard error of the mean, which depends on the sample standard deviation and the sample size.
(c) The confidence interval is constructed using the sample mean, margin of error, and the chosen confidence level (e.g., 95% confidence level).
(d) Finally, the interpretation of the confidence interval involves stating that, based on the sample data and chosen confidence level, you are X% confident that the true population parameter (mean in this case) falls within the calculated interval.
To perform these calculations accurately, the specific sample data (including the mean and standard deviation) and the confidence level are needed. Once provided, these statistical measures can be calculated, and a meaningful interpretation of the survey results regarding vulnerability to identity theft can be derived."