DNP 816 Quiz 2

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Northern Kentucky University *

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816

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Statistics

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Feb 20, 2024

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docx

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A sample of 10 orthopedic patients on a unit are being treated with anti-coagulants. This includes two patients on IV anticoagulants, four patients on oral anti-coagulants and 4 patients on subcutaneous anti- coagulants. Based on this sample, calculate the probability that orthopedic patients are given IV anti- coagulants. Correct! 2/10 or 1/5 or 20% Correct. Probability rates are calculated by taking the known number over the total number. They refer to the chance that a particular outcome will occur (always with some uncertainty). This is the likelihood that two/ten would be on an IV anticoagulant, while the probability of being on either subcutaneous or oral anticoagulants would be 4/10 or 40%. 4/10 or 40% 5% 50% Question 2 1 / 1 pts In a sample of 50 pregnant women, only 5 women end up having their baby more than 1 week after the due date, while 10 are delivered at least 1 week prior to the due date. What is the probability in this sample that a woman will deliver within 1 week of the due date? Correct! .7 or 70% Correct. The probability of the number of women who deliver within one week of their due date is 7/10 or 70% or .7 . The probability of delivering early is 20% or 10/50=.2 while the probability of delivering > 1 week after the due date is 5/10=10%. The total should equal 100% 10% or .1 .2 or 20% 80% or .8 Question 3 1 / 1 pts The measures of variability:
Correct! Indicate the extent to which individual scores deviate from one another Correct. Measures of dispersion indicate how different the scores are. Provide information similar to that of measures of central tendency Indicates all the scores are alike Are useful only for normally distributed populations Question 4 1 / 1 pts Why is the level of measurement of variables important in a statistical analysis? Correct! It affects what you can do with the data Correct. The level of measurement of the variables determines what type of analysis you are able to perform in your study- in other words, what you can do with the data. It determines the direction of the relationship It affects the power of a study It determines the power of a study Question 5 0 / 1 pts Which example is below would be the best way to measure the variable- weight? Correct Answer Weight in pounds You Answered Weight in three groups: under 125 lbs, 126 to 175 lbs and 176 lbs + Incorrect. This is an ordinal measurement. A ratio level measurement provides information about the critical attribute, the intervals between objects and an absolute zero. All math operations are possible with ratio level variables. This is known as a continuous variable.
Nnormal weight or overweight BMI score below 17, between 19 and 24 , above 25 Question 6 1 / 1 pts The level of measurement of these data are: Single Unmarried but in committed relationship Divorced Separated Widowed Correct! Nominal Data Interval data Ratio data Ordinal data Question 7 1 / 1 pts The total score on a multiple choice examination is an example of which level of measurement? Correct!
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