making statistical inferences iready quiz answers
A:
Concept:
Statistical inference uses data from a sample to draw conclusions about a population.
It includes estimation (point estimates and confidence intervals) and hypothesis testing, with uncertainty expressed as margins of error or p-values.
Example:
You survey 200 students about preferring online math lessons.
120 say yes, so p̂ = 0.
60. A 95% confidence interval for the population proportion is p̂ ±
1.96 × sqrt[p̂(1 − p̂)/n] ≈
0.60 ±
0.068, which is (
0.532,
0.668).
Interpretation: we’re 95% confident the true proportion lies in that range.