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Describe a possible parameter for a survey about TV watching

Describe a possible parameter for a survey about TV watching. Agenda. Go over “Is it valid” Notes, just a little Experiment on predicting population Worksheets Exit ticket. Random sampling. tends to produce representative samples and support valid inferences Not a planned group

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Describe a possible parameter for a survey about TV watching

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  1. Describe a possible parameter for a survey about TV watching

  2. Agenda • Go over “Is it valid” • Notes, just a little • Experiment on predicting population • Worksheets • Exit ticket

  3. Random sampling • tends to produce representative samples and support valid inferences • Not a planned group • Wide variety within sample

  4. Predicting population size • If the population size of a group is unknown, the sample sizes can be used to make predictions and calculate this number. • For example: • A forest has too many deer for us to count. We take a group of 100 deer and mark them then distribute them evenly throughout the population. Several days pass, then we take a sample of 120 deer and find that 20 of them are marked. We can set up a proportion to calculate the total population size. • i.e.=. 20x = 100(120) / 20 So, our estimate is there are 600 deer in our population.

  5. Experiment • Work with partner on completing experiment and worksheet

  6. Exit ticket • Name three kinds of sampling

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