inevitably we learned that Obama took the win.
Question 2
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?
Answer:
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 and explain the difference between them?
Ans.
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...
different conditions, some measures of central tendency become more appropriate to use than others. In the following sections, we will look at the mean, mode and median, and learn how to calculate them and under what conditions they are most appropriate to be used.
Mean (Arithmetic)
The mean (or average...
. (For n even, median = mean of the middle 2 values.) /1
(iii) Yes.
If the survey’s values of X were totalled, and divided by the number of households surveyed, then 38 would be the mean. /1
typical  exhibiting the qualities or characteristics that identify a group or kind or...
12 14 18 10 0 28 25 14 18 7 4 19 14 10 30 19
Measures of dispersion
Measures of central tendency (mean/median/mode) are used to summarise sets of numbers giving a score which is representative of the set. However in order to give a fuller picture, we need to know how spread out...
the above
9. Ogives for more than type and less than type distribution intersect at
(a) mean
(b) median
(c) mode
(d) origin
10. Which of the following is not a onedimensional graph
(a) Bar graph
(b) pie graph
(c ) O gives
(d) Cube
Chapter 2
Summary Statistics
Contents
1.1...
mean, median, and mode in smooth population probability density functions. The explanation will mainly refer to the positions of the mean and median. There may be comments about tail length and the role of extreme values in pulling the mean up or down. The mode usually gets scant mention, except...
: percentages, modes, frequency tables and diagrams,
crosstabulations, pie charts, bar charts, etc.
For ordinal data: medians, ranges, min, max, percentiles, rankings,
“top” lists, etc.
For metric data (interval and ratio): means, variances, standard
deviations, histograms, line graphs, scatter...
, …, xn
x
The most frequent value
PopulationMean
Sample Mean
N
X
n
i
x
i =1
N
Relationships Among Mean,
Median and Mode
x
i
i =1
n
Variables
• Definition:
– Characteristic or property of an individual
population unit
– Particular...
) Instead, we shall choose a representative sample from all accounts. But final conclusion may be misleading if inappropriate sample is chosen. Goal: choose appropriate samples.
5
Some definitions:
Population: A collection of elements about which we wish to make an inference. Sample: Part of the...
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...
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...
characteristics is: (Points : 1) 
Sample
PopulationMedian Group
Complete selection

16. Data which uses number values, has an equal distance between values, and has a possible absolute zero is: (Points : 1) 
Interval
Nominal
Ordinal...
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.
Chapter 8
MultipleChoice Questions
1. Which of the following is a characteristic of the normal curve?
a. Mean, median, and mode are different
b. Mean...
of location (mean, median and mode), spread (range, variance and standard deviation) and shape (skewness and kurtosis). Summarising data is, however, not always useful and can on occasions be misleading; when reading and interpreting papers, it is therefore important to be aware of inappropriate...
Session 2
Measures of central tendency & Dispersion Mean, Median, Mode Range, Mean deviation & standard deviation
Central Tendency
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...
use than others. In the following sections we will look at the mean, mode and median and learn how to calculate them and under what conditions they are most appropriate to be used.
Mean (Arithmetic)
The mean (or average) is the most popular and well known measure of central tendency. It can be used...
the mean, mode and median and learn how to calculate them and under what conditions they are most appropriate to be used.
Mean (Arithmetic)The mean (or average) is the most popular and well known measure of central tendency. It can be used with both discrete and continuous data, although its use...
conditions, some measures of central tendency become more appropriate to use than others. In the following sections, we will look at the mean, mode and median, and learn how to calculate them and under what conditions they are most appropriate to be used.
Mean (Arithmetic)
The mean (or average) is...