1. As part of a study, investigators wanted to assess the accuracy of self-reported smoking status. Participants are asked whether they currently smoke or not. In addition, laboratory tests are performed on hair samples to determine presence or absence of nicotine. The laboratory assessment is considered the gold standard, or truth about nicotine. The data are as follows:
|
|
Nicotine Absent |
Nicotine Present |
|
Self-Reported Non-Smoker |
82 |
14 |
|
Self-Reported Smoker |
12 |
52 |
A. What is the sensitivity of self-reported smoking status?
B. What is the specificity of self-reported smoking status?
2. A recent study reported that the prevalence of hyperlipidemia (defined as total cholesterol over 200) is 30% in children 2–6 years of age. If 12 children are analyzed,
A. What is the probability that at least 3 are hyperlipidemic?
B. What is the probability that 3 are hyperlipidemic?
C. How many would be expected to meet the criteria for hyperlipidemia?
Refer to the Histogram tab in the Excel Assignment Spreadsheet and answer the following.
What percent of the sample weighs 170 lbs. or less? ____
How many subjects weigh more than 200 lbs? ____ 1 pt
What percent of the subjects weigh more than 200 lbs? ____ % 1 pt
Based on the graph the median weight is approximately: _____ lbs. 1 pt
How many subjects weigh less than 200 lbs? _____ lbs. 1 pt
Refer to the PercentileRank tab in the Excel Assignment Spreadsheet to answer the following questions.
What percent of the sample weigh 172 lbs. or less? ______ % 1 pt
What percent of the sample is 200 lbs or more? ______ 1 pt
What is the median weight? _____ lbs. 1 pt
25% of the sample weighs less than or equal to: _____ lbs. 1pt
Look at the summary statistics in the Descriptives tab.
What is the median for Wt Grp 3? _194_____ 1 pt
They have a magnificent team. These people are always kind and willing to listen to your concerns or issues. Better yet, your assignment is always ready before the time, they usually send you a draft to double-check before they finalize your paper.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.
Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.
Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.
Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.
Read more