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MMW unit IV

Measures of central location and Measures of Dispersion

QuestionAnswer
It represents the value of where data observations tend to cluster; represents entire mass of data by a single value. Measures of Central Location.
Which is a very sensitive measure that can only be used on interval or ratio data? Mean
If two sets of data have the same median, then the data must be the same. True or False? False
It is the measure of dispersion that depends only on the two most extreme values of data. Range
It is a measure that only considers order and is unaffected by extreme scores, also called the middle score. Median
It can be used for any levels of measurements; measures the most frequently occurring value in a data set. Mode
It describes how spread the data are and measures the variation of data values among themselves. Measures of dispersion
It a measure of dispersion that takes the difference between the greatest data and the least data value. Range
It makes use individual amount that each data values deviate from the mean. Standard deviation
When the data values have equal frequency the mode... does not exist
When the data sets have two most frequently occurring values, it is called? Bimodal
Class A has the mean of is 51.38, SD: 4.03 and sample variance of 16.24.. Whereas class B has a mean of 53, SD: 8.64, and sample variance of 74.65. Which class produced more consistent results? Class A
If the standard deviation of a mean is low it means that the mean is? Reliable
Data sets with three or more frequent data values is called? Multimodal
If the standard deviation is closest to zero there is a? lower data variability and a more reliable mean.
If the standard deviation is the variation in the data and the mean is? Data variation is high; Mean is less accurate.
What is the mean of this data set: 48, 51, 50, 47, 51, 49, 58, 57? 51.38
What is the mean of this data 44, 54, 58, 61, 66, 40, 51, 50? 53
Calculate the range of this set 48, 51, 50, 47, 51, 49, 58, 57. 11
Calculate the range pf this set 44, 54, 58, 61, 66, 40, 51, 50. 26
It is a measure of dispersion that is the square of standard deviation. What is it called? Variance
Calculate the standard deviation of this sample 48, 51, 50, 47, 51, 49, 58, 57. 4.03
Calculate the standard deviation of this population 1, 2, 5, 7, 8. 7.44
Created by: honeybunch
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