Statistics Assignment | College Homework Help

Can someone help me answer the following questions about the article below?

  • Do you believe

the results? Why or why not?

State the reported confidence interval(s) estimate in two ways: the upper and lower limits the sample proportion ± the error term(don’t forget to include the confidence level)State the meaning of the confidence interval(s). Can a reported mean of your article data be treated as a value from a population having a normal distribution? Why or why not?
The question “How statistically significant are the results of a study?” can be answered in several ways. For example, the difference in mean blood-pressure-lowering effect between a new drug and placebo from a specific study can be expressed as:
Difference= 8.5 mm Hg; P=.03
However, the true effect of the drug is unlikely to be exactly 8.5 mm Hg–if the study were repeated, the results would be somewhat different. The variation is not explained by the P value. The P value is prone to misinterpretation, as will be explained in a future Language of Evidence. It tells us only that a difference is significant; it says nothing about its magnitude or precision.
Confidence intervals are a better alternative. Consider the difference above expressed as a confidence interval:
Difference=8.5 mm Hg; 95% CI, 6.3-10.8 or, graphically:
The probability of obtaining a result of 8.5 mm Hg, assuming the true value is not within the interval of 6.3-10.8 mm Hg, is 5% or less. In other words, one wouldn’t get the result above very often if the true value is outside the interval. This interpretation seems convoluted. It is easier to think of it this way: “The true value for the difference is most likely between 6.3 and 10.8. It is unlikely to be outside of this interval.”

1. The wider a confidence interval, the less precise the estimate. Precision depends upon sample size. Therefore, the larger the sample size of a study, the narrower the confidence interval and the better the estimate. In the example above, a similar study with a much larger sample size may yield a narrower difference: 8.5 mm Hg; 95% CI, 7.4-8.9.
2. The 90% (or lower) confidence interval for an estimate is narrower than the 95% confidence interval; a 99% confidence interval is wider. This makes sense, since we are surer that a true value lies between 2 widely separated numbers than 2 more narrowly separated numbers.
3. If the confidence interval includes “no difference”(in this case, zero change in blood pressure), the corresponding P value must be >.05. “No difference” for a result expressed as a subtraction is zero; for a result expressed as a ratio (such as an absolute difference or a relative risk), it would be 1. It is important to keep this difference in mind when interpreting confidence intervals.

Calculate the price of your order

Select your paper details and see how much our professional writing services will cost.

We`ll send you the first draft for approval by at
Price: $36
  • Freebies
  • Format
  • Formatting (MLA, APA, Chicago, custom, etc.)
  • Title page & bibliography
  • 24/7 customer support
  • Amendments to your paper when they are needed
  • Chat with your writer
  • 275 word/double-spaced page
  • 12 point Arial/Times New Roman
  • Double, single, and custom spacing
  • We care about originality

    Our custom human-written papers from top essay writers are always free from plagiarism.

  • We protect your privacy

    Your data and payment info stay secured every time you get our help from an essay writer.

  • You control your money

    Your money is safe with us. If your plans change, you can get it sent back to your card.

How it works

  1. 1
    You give us the details
    Complete a brief order form to tell us what kind of paper you need.
  2. 2
    We find you a top writer
    One of the best experts in your discipline starts working on your essay.
  3. 3
    You get the paper done
    Enjoy writing that meets your demands and high academic standards!

Samples from our advanced writers

Check out some essay pieces from our best essay writers before your place an order. They will help you better understand what our service can do for you.

Get your own paper from top experts

Order now

Perks of our essay writing service

We offer more than just hand-crafted papers customized for you. Here are more of our greatest perks.

  • Swift delivery
    Our writing service can deliver your short and urgent papers in just 4 hours!
  • Professional touch
    We find you a pro writer who knows all the ins and outs of your subject.
  • Easy order placing/tracking
    Create a new order and check on its progress at any time in your dashboard.
  • Help with any kind of paper
    Need a PhD thesis, research project, or a two-page essay? For you, we can do it all.
  • Experts in 80+ subjects
    Our pro writers can help you with anything, from nursing to business studies.
  • Calculations and code
    We also do math, write code, and solve problems in 30+ STEM disciplines.

Frequently asked questions

Get instant answers to the questions that students ask most often.

See full FAQ
    See full FAQ

    Take your studies to the next level with our experienced specialists