A measured value is within two standard deviations of the mean but not within one standard deviation, and it is greater than the mean. The distribution is very close to a normal distribution. What does this signify? (Select all that apply.)
a. This particular value is not an outlier.
b. In the data set, almost 2/3 of the values are closer to the mean than this one is.
c. The data point falls within the majority of the measured values, in terms of its closeness to the mean.
d. In the data set, at least 4% of the values are further from the mean than this particular value is.
e. In this data set, between 65% and 95% of the values are smaller in value than this one is.
ANS: A, B, D, E
The range, standard deviation, and variance are statistics that describe the extent to which the values in the sample vary from one another. The most common of these statistics to be reported in the literature is the standard deviation, because of its direct association with the normal curve. If the frequency distribution of any given variable is approximately normal, knowing the standard deviation of that variable allows the reader to know what percentages of subjects' values on that variable fall between +1 and –1 standard deviation. In a normal distribution, when a standard deviation is calculated, 34.13% of the values are between the mean score and 1 standard deviation above the mean. Similarly, 34.13% of the values are between the mean score and 1 standard deviation below the mean. The middle 95.44% of the subjects' scores are between +2 standard deviations and –2 standard deviations.
You might also like to view...
A 5-year-old boy has been admitted with severe asthma. His initial PaCO2 was 30 mm Hg. One hour later his PaCO2 is 45 mm Hg, and 1 hour after that, his PaCO2 is 56 mm Hg. Which of the following interventions would be anticipated?
a. High-dose steroids c. Fluid resuscitation with normal saline b. Chest percussion and vibration d. Mechanical ventilation
A client has been admitted for a commissurotomy. You know that a commissurotomy repairs which of the following?
A) A ventricle B) A valve C) Part of the myocardium D) An artery
When planning care of childbearing families, the nurse encounters different spiritual and religious beliefs and practices. Which of the following is a spiritual practice that could impact the nurse's care of the childbearing family?
A. A strong belief in reincarnation, and thus refusal of an autopsy B. The desire to light candles at home during a naming ceremony C. Request by the family to speak to a Roman Catholic priest D. Refusing consent for a blood transfusion by a Jehovah's Witness
What intervention is considered the most effective approach for getting an addict into treatment?
a. Arranging a planned confrontation from people with leverage b. Taking the addict to the emergency department for a psychiatric admission c. Calling the police and having the addict taken to jail d. Waiting until the addict recognizes the need for treatment