Unit 4 Quiz
Income in a large population is usually normally distributed.
False
The appropriate measure of central tendency to use with nominal data is which of the following?
Mode
What does the symbol M represent?
the mean
The mean should always be the measure of central tendency used because it is always the most accurate.
False
In a normal curve, where is the highest point of the curve?
In the middle
When a distribution is skewed, what is the best measure of central tendency?
Median
In a perfectly symmetrical distribution, the mean, median, and mode all have the same value.
True
The mean is appropriate to describe a distribution only if it is normally distributed.
True
A positively skewed distribution looks like which of the following?
Peak to the left, tail to the right
What is the best description of a distribution that has 3 peaks?
Trimodal