Statistical Problem Solving

Statistical Problem Solving-49
Data must be organized, summarized, and represented properly in order to provide good answers to statistical questions.

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You will become increasingly familiar with this process as you investigate different statistical problems.

Think of a general question that could be answered with statistics.

In short, I think most people (and I am as guilty of this as anyone) don’t spend enough time on the first three steps before jumping right to number four.

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happens when "favoritism" in the data collection process (or the reporting process) occurs, resulting in misleading results.

When dealing with data, it is possible that different statistical studies, concerning the same issue, can arrive at very different results.Therefore, in however many parts I feel like doing, I am going to discuss how to solve any statistics problem. Here is an example: For 17 girls diagnosed with anorexia, weight change after family therapy was as follows: 11,11, 6, 9, 14, -3, 0, 7, 22, -5 , -4, 13, 13, 9, 4 , 6, 11 Partial results are shown below. “ The degrees of freedom when you are estimating the mean with one sample is N-1, or 17-1, which is 16.To understand a problem, look at the numbers you DO have. If it doesn’t fall between your upper and lower confidence limits, you did something wrong.Statistics can also be misleading, as shown in the classic book How to Lie with Statistics by Darrell Huff.Here is a list of common statistical procedures, used to analyze and draw conclusions on a given set of data. This is a class of really smart people in a doctoral program at a selective university.And yet, some of them still had problems with the quiz. Often, I see people make mistakes because they panic, think they can’t do it, underestimate themselves and think, “The problem cannot be that easy”. You need to find the upper confidence limit for the mean, the t-value and the degrees of freedom. “A single sample: There are degrees of freedom for estimating variability.Now think carefully about the four steps listed above.How would you carry out each step in order to answer your question? In this video segment, group members use the data they collected to answer their statistical question.The word statistics may bring to mind polls and surveys, or facts and figures in a newspaper article.But statistics is more than just a bunch of numbers: Statistics is a problem-solving process that seeks answers to questions through data.

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