STAT 1000Q Lecture Notes - Lecture 21: Point Estimation, Standard Deviation, Statistical Parameter
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Stat 1000q lecture 21 - confidence intervals for population. Con dence intervals for population proportions population proportion (p)- the fraction of a population that has a characteristic of interest under study. Q = 1 - p = fraction of the population without the characteristic of interest. A population proportion is a population parameter. We need its value along with a point estimate and con dence interval. If both np 15 and nq 15, sampling distribution of p is approximately normal; mean is p and standard deviation is. The true value of p is unknown, so: (p q )/(n) sampling error se (margin of error)- the error term in a ci. Town having a budget referendum in 1 week. n = 1500 registered voters. Poll shows yes" voters with 50. 3%, margin of error of 2. 1%. This is too close to call because the ci contains. To predict the yes voters as winners with.
