The Sampling Distribution of P-hat, The Sample Proportion. Includes Example problems. скачать в хорошем качестве

The Sampling Distribution of P-hat, The Sample Proportion. Includes Example problems.

What the sampling distribution of p-hat is. How you use the Distribution of p-hat. How you find a z-score for p-hat. How you find a probability for p-hat. 00:00 Introduction 00:28 Finding p-hat, the sample proportion 01:18 The sample proportion varies from sample to sample 02:10 p-hat is a variable! 02:24 the Central Limit Theorem 03:11 The Sampling Distribution of p-hat 07:18 The expected value of p-hat 09:24 Example Problems (1-4) 12:31 The Standard Deviation of p-hat 15:23 Calculating the Standard Deviation 17:12 Normalizing the sample proportion by finding its Z-score 19:07 Answering Question #4 20:12 Finding the area under a Normal Distribution with a TI-83 (or TI-84) Calculator 22:05 Why are sampling distributions important? 23:53 Summary "p-hat" is the proportion of a sample. Since it is a number calculated from a sample, it is a "statistic". P-hat can be used to estimate P, the proportion of the entire population. (P is a parameter).