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Homework Questions

Homework Questions. Section 8.3 Estimating a Population Mean. One-Sample Z Interval for a Population Mean. As long as the Random, Normal, and Independent conditions are met…This is your confidence interval! We use this when we know. Choosing a Sample Size. Now that we know

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Homework Questions

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  1. Homework Questions

  2. Section 8.3 Estimating a Population Mean

  3. One-Sample Z Interval for a Population Mean • As long as the Random, Normal, and Independent conditions are met…This is your confidence interval! • We use this when we know

  4. Choosing a Sample Size • Now that we know • Ex: Obtaining monkeys is time-consuming and expensive, so researchers want to know the minimum number of monkeys needed to generate a satisfactory estimate of cholesterol levels for a study. They want their estimate to be within 1 mg/dl of the true value of at a 95% confidence interval.

  5. When is unknown…T distributions

  6. When is unknown…T distributions

  7. One-Sample t interval for a Population Mean • Use when the population is Normal or the sample size is large enough () and the population is at least 10 times the sample size.

  8. T procedures: The Normal Condition • Sample size less than 30 – use t if the data appear close to Normal (roughly symmetric, single peak, no outliers). Do not use otherwise. • Large Samples – t can be used even for clearly skewed distributions

  9. #63

  10. Homework #2 • Pg 518 (63, 67-70, 72-78)

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