'True population' diaporamas de présentation

Section 4 Confidence Intervals

Section 4 Confidence Intervals. William Christensen, Ph.D. Using Confidence Intervals to Estimate Population Parameters.

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GRAPHS & STATS

GRAPHS & STATS. More on scatterplots Exporting data Overview of statistics T-tests. 20 September 2014 Sherubtse Training. HtWt Data. What kinds of interesting questions can we ask? What graphs would we make to answer them?.

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Spreadsheet Modeling & Decision Analysis

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Probability & Statistics for P-8 Teachers

Probability & Statistics for P-8 Teachers. Chapter 5 Probability Distributions. Probability Distributions. We will now combine the methods of descriptive statistics (Chapter 2 and 3) and those of probability (Chapter 4) to describe and analyze probability distributions .

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AP Statistics: Section 10.1 A

AP Statistics: Section 10.1 A. Statistical inference provides methods for drawing conclusions about a population from sample data. The two most common types of formal statistical inference are.

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Sample Size Determination

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Confidence Intervals for Population Means

Confidence Intervals for Population Means. BUSA 2100, Sections 8.1, 8.2. Estimation Process. Point estimates are single numbers, e.g. X-bar = $35,000. Point estimates should be close to the true population mean (or proportion), but are almost never exactly equal.

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Section 8.1

Section 8.1. Statistics and Sampling Variability. Introduction. Suppose I want to know the average GPA of seniors at Glacier Peak. I could track down every senior at GP and ask them their GPA, this would give me the true mean of the population OR I could take a sample.

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Diversity. What is it?. Pop A. Pop B. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *. X. Polymorphic. Monomorphic. (if referring to single-locus data).

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Hypothesis Testing

Hypothesis Testing. It is frequently expected that you have clear hypotheses when you have a study using quantitative data. Older citizens are more likely to vote. Men are more likely to like computers. Rural schools perform higher than urban schools How do we test these hypotheses?

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Confidence Intervals

Confidence Intervals. General Mean ( ? ). Computation. First, edit and summarise the data. Obtain: sample size (n), sample mean (m) and sample standard deviation(sd). Note the indicated confidence level for the desired interval. Obtain the confidence coefficient (Z) via table look-up.

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QoE Evaluation Methodology for HD Video Streaming using Social Networking

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The US LCI Database Moving Toward Full LCI Data by Material and Product

The US LCI Database Moving Toward Full LCI Data by Material and Product. By William E. Franklin And Beverly J. Sauer Franklin Associates, A Division of ERG. Background. The US LCI database is underway, as described by Greg Norris in the preceding presentation.

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S-012

S-012. Testing statistical hypotheses The CI approach The NHST approach. The key steps. The CI approach. The NHST approach. State hypothesis Null and alternative Set criterion Level of significance or Alpha level (e.g., 0.05) Compute test statistic and the probability value

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