a) Compute the mean, median, mode of the data. b) Compute the 5% trimmed mean of the data. c) Compute the 10% trimmed mean of the data. (20.25) d) Compare the result you obtained in parts (a) – (c). Which of the results provides the best measure of center for the data? (median or 10% trimmed mean...
inevitably we learned that Obama took the win.
What are the characteristics of a population for which it would be appropriate to use mean/median/mode? When would the characteristics of a population make them inappropriate to use?
The mean is the arithmetic average of all numbers...
What are the characteristics of a population for which a mean/median/modewould be appropriate? Inappropriate?
The analysis of data begins with descriptive statistics such as the mean, median, mode, range, standard deviation, variance, standard error of the mean, and confidence intervals. These...
of central tendency
Aim: to (univariately) describe the distribution of variables on different levels of measurement
MEANMean: a first a first measure of central tendency
for the sample: for the population:
Characteristics of the mean:
* Changing a score will change mean...
on the higher or lower end of a distribution is the: a. median. b. mean. c. mode. d. all of the above e. none of the above 5. A large mass of data can best be summarized pictorially by means of: a. the range b. a histogram c. the frequency table d. the variance 6. Any characteristic of a population...
difficult it will be to make the case that what you find in the sample indeed reflects what you expect to find in the population.
1. Which of the following is a characteristic of the normal curve?
a. Mean, median, and mode are different
have same value/If exactly one mode, it has same value as the mean and the median/Distribution may have more than one mode,
or no mode at all Variability can be defined several ways/A quantitative measure of the differences between scores/Describes the degree to which the scores are spread out or...
Measures of central tendency & Dispersion Mean, Median, Mode Range, Mean deviation & standard deviation
One of the most important objectives of statistical analysis is to get one single value that describes the characteristic of the entire mass of unwieldy...
, depending on the allocation of the median, mode, and meanwhich represent the three measures of central tendency and determine the outcome of frequency distribution results (Portney &ump; Watkins, 2009).
In a normal distribution, the mean, median, and mode have equal values, and all three values...
, recorded and analyzed without error. Since this would take considerable time and money, and since the probability of collecting the data necessary to determine the true annual salary of the students is small, a sample of this population will be taken. The sample mean annual salary of the sample of...
( See Mean, Median, Mode Definition)
sidebar: Greek Symbols for Parameter, Alphabet for Stats i.e. N and n (SLIDES 17-19)
Mean - susceptible to outliers
Median - Not mathematically tractable
Mode - Graph big data can show us the concentration (PEAKS - can be many peaks in a graph (i.e. VIDEO...
interviews he or she needs or until all contacts have been exhausted.
Quota Sample. A quota sample is one in which units are selected into a sample on the basis of pre-specified characteristics so that the total sample has the same distribution of characteristics assumed to exist in the population being...
situation we would like to have a better measure of central tendency. As we will find out later, taking the medianwould be a better measure of central tendency in this situation.
Another time when we usually prefer the median over the mean (or mode) is when our data is skewed (i.e. the frequency...
Practical Application of Statistics
Mean, Median, and Mode
Assume that five bids are received for an engineering project, with total costs of $22,000; $35,000; $37,000; $40,000; and $65,000. The mean, or arithmetic average, of the bids is $39,800. The median, which is defined as the middle value...
extensive statistical analysis, or they may be sufficient in and of themselves for a particular investigation.
Univariate analysis involves describing the distribution of a single variable, including its central tendency (including the mean, median, and mode) and dispersion (including...
of central tendency and explain the difference between them?
Three measures of central tendency are: mean, median, and mode.
The mean for a distribution is the sum of the scores divided by the number of scores.
Some characteristics of the mean include:
• Every score influences the mean...
characteristics is: (Points : 1) |
16. Data which uses number values, has an equal distance between values, and has a possible absolute zero is: (Points : 1) |
the distribution. If the value of a datum in the distribution changes from a non-modal value to the modal value, the value calculated for the mode remains the same, even though the meanwould (and the median might) change.
The median represents the middle score of the distribution. If the value of...
comprise the mode, median and the mean.
Data set 1. Blood group of 10 students: A, B, A, O, AB, A, B, O, A, A
Data set 2. Grades of 10 students: A, B, B, C, D, A, B, C, A, F
• The mode is the simplest, but also the least widely used, measure of central tendency.
• It is the score that...