from the sample in their study to the larger population.DIF:Cognitive Level: AnalysisREF:Page 537

2.What is this particular distribution called?a.Bimodalb.c.Camelesqued.Negatively skewedANS:ANormalAnother characteristic of distributions is their modality. Most curves found in practice are unimodal, which means that they have one mode and frequencies progressively decline as they move away from the mode. Symmetrical distributions are usually unimodal. However, curves can also be bimodal or multimodal. accurately reflect the shape of the population from which the sample was taken.DIF:Cognitive Level: ApplicationREF:Page 5403.A researcher reports that the heights of men aged 53 living in Rapid City, South Dakota, are between 5’7” and 6’0” and that the confidence interval is calculated at thep <.05 level. What does this mean?If a 53-year-old man in Rapid City, South Dakota, is measured, there is a 95% chance that his height will fall in the 5’7” through 6’0” interval.The heights of the men in the sample were all between 5’7” and 6’0”, and the sample was representative of 95% of the menin town.When the probability of including the value of the parameter within the interval estimate is known, this is referred to as a confidence interval. Calculating a confidence interval involves the use of two formulas to identify the upper and lower ends of the interval. A confidence interval is actually an estimate.DIF:Cognitive Level: SynthesisREF:Page 5414.There are four data sets:A: 1, 1, 1, 1, 1, 10, 10, 10, 10B: 2, 2, 2, 2, 4, 8, 8, 8, 9C: 3, 4, 4, 5, 5, 5, 6, 6, 7D: 1, 2, 3, 4, 5, 6, 7, 8, 9What is the mean of the four individual data sets?1, 4, 5, 5The measures of central tendency are descriptive statistics. The statistics that represent “measures of central tendency” are the mean, median, and mode. All of these statistics are representations or descriptions of the center or middle of a frequency distribution. The mean is the arithmetic average of all of a variable’s values. The median is the exact middle value (or the averageof the middle two values if there is an even number of observations). The mode is the most commonly occurring value in a data set. In a normal curve, the mean, median, and mode will be equal or approximately equalDIF:Cognitive Level: AnalysisREF:Page 538

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- Fall '16
- Denise Cauble
- Nursing, researcher, Cognitive Level