Chapter 7

# Chapter 7 - Chapter7 1 RandomSample selected ,wemakenrandom...

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Chapter 7 Sampling Distributions 1

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Chapter 7 - Sampling Distributions DSC 205 Random Sample: – if we select n elements from a population in  such a way that every set of n elements in the  population has the same change of being  selected.  – In order to select a random sample of n  elements from a population, we make n random  selections – one at a time – from the population.  On each selection, we give every element  remaining in the population for that selection the  same chance of being chose. We want to randomly select 10 Miami Students.  What scenarios below reflect random sampling? 1. Go to Shriver during lunch hour and pick 10 people. 2
Chapter 7 - Sampling Distributions DSC 205 Sampling Distribution of the sample mean Example. There are 6 possible prizes in a game show and the participant has to select one from the six envelopes that contain the check with the prize: 10 20 30 40 50 60 µ = 35 σ = 17.08 If we graph the distribution we’ll see it is uniform. Histogram: 3 _ X Probability distribution of the population of all possible sample means obtained from all possible samples of the same size.

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Chapter 7 - Chapter7 1 RandomSample selected ,wemakenrandom...

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