Presentation on theme: "Chapter 7 Sampling Distributions General Objectives: We begin to study samples and the statistics that describe them. These samples statistics are used."— Presentation transcript:
There are ten possible random samples of size n 3 and each is equally likely with probability 1/ 10. These samples, along with the calculated values of and m for each, are listed in Table 7.3. You will notice that some values of are more likely than others because they occur in more than one sample. For example: and
Properties of the Sampling Distribution of the Sample Proportion, : n If a random sample of n observations is selected from a binomial population with parameter p, then the sampling distribution of the sample proportion will have a mean and a standard deviation When the sample size n is large, the sampling distribution of can be approximated by a normal distribution. The approximation will be adequate if np 5 and nq 5.