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Confidence Intervals
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In the second part of this assignment, you will undertake some formal statistical procedures with the natality data. We will repeat the previous steps, with some slight modifications.

  • Return to the CDC Wonder website.
  • Click on Births under the WONDER Online Databases to get to the Natality Information screen.
  • Select Natality for 2007 - 2012.
  • On the next screen, click I Agree in order to agree to abide by the government rules for data use (primarily, concerning confidentiality).
  • This will bring us to the Natality, 2007-2012 Request screen.
    • In block 1. Organize table layout, group results by race and then gender (not year).
    • In block 2. Select maternal residence, choose your state.
    • You can leave block 3 at its default values (typically, All).
    • In block 4. Select birth characteristics; select All Years under Year, and 1st child born alive to mother under Live Birth Order.
    • Blocks 5 and 6 can be left at their default values.
  • Click Send. A new screen will open, with data (births) tabulated by race and gender.
  • Click Export, click Save, and a text file named Natality 2007-2012.txt (or something similar) will be downloaded onto your computer.
  • Return to the data you just generated in the second part of the Week Two assignment. You should have total numbers of first-born boys and girls in your state between the years 2007 and 2012 separately by racial group: American Indians or Alaska Natives, Asian or Pacific Islanders, Black or African Americans, and Whites. For the first part of this discussion, construct and report the 95% confidence intervals for the proportions of first-born boys, separately for each racial group. (Use the normal approximation to the binomial distribution.) Comment on the confidence intervals: can you infer from the confidence intervals that the proportions of first-born boys differ among the racial groups? Explain what the widths of the confidence intervals tell you.
  • Leading up to elections, you often hear results of polls of voters’ preferences, with statements such as: “This poll was taken from a random sample of 600 potential voters, and has an accuracy exceeding 96%.” You may want to interpret the accuracy statement in terms of "margin of error", as explained in the text, Section 6-2. Remember, the width of a confidence interval is a measure of the precision of the estimate.

I have attached my file for 2007-2012 but Idonot think its accurate appreciate the assistance

From Health Care, General Health care Due on: 13 Jan, 2017 07:00:00 Asked on: 13 Jan, 2017 07:55:15
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