Ch 4: Central Tendency
Median for the scores 0, 0, 1, 1, 1, 2, 3, 3, 3, 3 is ______.
1.5
Mode of the scores 1, 2, 2, 3, 3, 3, is ______.
3.0
Consider the set of scores, 3, 5, 6, 7, 10 in the distribution. An additional score of ______ in this set would NOT affect the median.
6
Consider the set of scores, 3, 5, 5, 6, 7,10 in the distribution. An additional score of ______ in this set would NOT affect the mode.
8
central limit theorem
The theory that, as sample size increases, the distribution of sample means of size n, randomly selected, approaches a normal distribution.
What is a true statement of the set of scores, 17, 19, 21, 50?
There is no mode.
central tendency
a measure that represents the typical response or the behavior of a group as a whole
how do you find the median when you have an equal number of scores?
add the two middle score and divide them by two
outlier
an extreme deviation from the mean
standard deviation
average distance of every score from the mean; will tell you the mean you must go to capture 68.26 of the values in the data set
Three main types of descriptive statistics are ______, ______, and ______.
central tendency; variability; visual representation
range
difference between highest and lowest scores
For some negatively skewed distribution, the mean and median can be _____.
equal
cumulative frequency
frequency at or below a score
The median ______.
is not affected by the extreme scores in the distribution
mean
located at the mathematical center of a distribution
The ______ is most influenced by extreme scores in the distribution.
mean
When you have a skewed distribution, it is better to use ______ than ______.
median; mean
The ______ and ______ are good measures of central tendency for ordinal data.
median; mode
Adding a score that is equal to the mean of the distribution could change the ______.
mode
Which is the best measure of central tendency if you are interested in a gender breakdown of managerial position at a certain company?
mode
mode
most frequently occurring score; used with nominal scores; top of the peak
The mean salary of employees of a company is US$45,316, and the median salary is US$58,450. The distribution of salary at this company is ______.
negatively skewed
unimodal
one mode
percentile
percentage at or below a score
relative frequency
possibility of a score occurring
When you have a positive skew, the mean CANNOT be ______ the median.
smaller than
variance
squared average distances of all your scores back to the mean
standard error of the mean
standard deviation for the sample mean
perfectly normal distribution
standard deviation will be closer to the mean; mean, median, and mode will be exactly the same
The mean and median are equal when you have a(n) ______.
symmetrical distribution
If everyone in your sample picked the same answer for a question, ______.
the mean, median and mean are equal
median
the middle score in a distribution; half the scores are above it and half are below it; used with ordinal scores or highly-skewed interval or ratio scores
If you have a distribution where every score occur only once, then ______.
there is no mode
bimodal
two modes
small standard deviation
values are gathered close to the mean
large standard deviation
values are more spread out
Which of the following data would be most appropriate to report mean?
weight of adult men
If you have an interval data, what circumstance is mean an appropriate measure of central tendency?
when the distribution is symmetrical