31 Aug Descriptive Statistics and Probability
- Show your work and explain your process for determining the solution for each of these problems on a word document with the solution given below the problem.
- If Excel was used, please indicate that as well on the word document.
- A word document and/or the Excel Workbook (if used) should be submitted to the Dropbox with labels on the worksheets to indicate which problem is being evaluated.
- All answers should be clearly indicated.
- Written explanation, reasoning, and rationale should use complete sentences.
Visit the to view the datasets that accompany our textbook. Review the dataset titles and select a data set of interest to you that has at least 30 data values. See and CA Video Starter in this modules .
- Summarize data with frequency distribution tables.
- Create a frequency distribution table from the data selected.
- Write a sentence for each of three findings based on the frequency distribution table in terms of the variable chosen.
- Visualize numeric variables through histograms.
- Using your frequency information construct a histogram (for continuous variables) or bar chart (for discrete variables). Make sure to title your chart appropriately.
- Based on this visual representation, does the data appear to be left skewed, right skewed, or symmetrical. Explain your rationale for the choice.
- Calculate measures of central tendency.
- Determine the mean, median, mode, and midrange for the data.
- Determine if the data selected is left skewed, right skewed or symmetrical. Explain the rationale for choosing which way the data is skewed.
- Interpret data with descriptive statistics.
- Calculate Q1, Q2, and Q3. Explain the the significance for each measure found. In terms these results, explain the meaning of the interquartile range.
- Calculate the standard deviation for your data. Describe the range of values that are within 3 sigma of the mean and the impact it has on the likelihood of a value being in that range in terms of the variable chosen.
