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Descriptive Statistics Homework.
|The data for this assignment is from problem 18in section 3.5, on page 176. I include the data in an Excel file. For StatCrunch, you select the data set from the book (3_5_18) to import the 60 data points.|
· Generate the descriptive statistics for both the babies with smoking fathers and with non-smoking fathers.
· You may work by hand, but this is a good chance to try Excel and/or StatCrunch for speeding many of the calculations.
· If you work in StatCrunch you will need to transfer the descriptive statistics into the two forms. A photo of any graphs may be inserted into your documents that you submit.
|· You can print the two forms and write your answers on it. Then scan it (watch the videos in D2L about uploading written work).· The pages should be…· Right-side-up· Expanded to the full size of the page· Numbered in order, in one document· Saved as ONE file, either as a Word document or a PDF file. (I will not be able to grade google docs or Mac Pages or other file types).· It is important to double check the file after you upload it to make sure everything is complete and uploaded correctly.||· You can type directly into the two Excel form files; one for Smokers and one for non-Smokers.· Download the files as Excel documents.· Type your descriptive statistics into the cells and draw bars into the histogram.· If you work with Excel functions, put the correct function into each statistic cell.· Save each file as an Excel spreadsheet or a PDF file· It is important to double check the file after you upload both files, or else merge the two spreadsheets into a single Workbook and upload it.|
|Baby birth weights (grams)|
1) The data points are all in the Excel files. The data may be copied and pasted into StatCrunch.
2) If you work with a calculator, you will need to enter the data points by hand.
3) The following Descriptive Statistics must be calculated twice, once for the Smoker fathers (30 data points) and again for the non-smoker fathers.
a. Fill in the Frequency and Relative Frequency table, including totals for both columns.
b. Draw a histogram using the premade grid, or generate a histogram using Excel or StatCrunch and pasting in an image)
c. Enter the Measures of Central Tendency – mean, median, and mode.
d. Enter the Measures of Dispersion – Standard Deviation, Variance, and Range.
e. Enter the 5 number summary – minimum, quartile 1, median, quartile 3, and maximum.
f. Calculate the Z-score for both the minimum and the maximum values. State if either weight is an outlier.
g. Calculate the lower and upper fences (using IQR). State if either the minimum or maximum weight is an outlier.
h. Hand-draw a boxplot, or else paste a boxplot generated with Excel or StatCrunch.
4) Repeat for all the calculations for the non-Smokers set of 30 data points.
5) Compare the two completed forms to see if there appears to be a difference in birth weight between babies with smoker fathers and those with non-smoker fathers. This is the possible results for the study. Do any of the statistics seem to support the idea that second hand smoke from fathers reduce the birth weight of the babies?
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