Socialist Party Voters a Pollster in Italy Wants to Challenge a Claim

question 72

Essay

Socialist Party Voters
A pollster in Italy wants to challenge a claim that 5% of the registered voters in his country are Socialists; he thinks the percentage is lower than that.In a test of hypothesis,H₀: p = 0.05 vs.H₁: p < 0.05,his random sample of size 1,000 registered voters revealed that the number of Socialists was 40. ​ ​
-{Socialist Voters Narrative} Construct a 95% confidence interval estimate of the population proportion and explain how to use it to test the hypotheses.

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Definitions:

Predictive Validity

How well a rating on an examination or metric anticipates subsequent success in a similar endeavor.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values.

Reliability

Refers to the consistency and stability of a measure or test over time.

Validity

The extent to which a test, scale, or measuring instrument accurately measures what it is intended to measure.