Chapter 4A Questions
In a negatively skewed distribution, explain the values of mean, median, and mode
The mean is smaller than the median and the median is smaller than the mode
What is the median of an ordered set with 30 observations
The average of the 15th and 16th observation
In a positively skewed distribution, explain the values of mean, median, and mode
The mean is bigger than the median and the median is bigger than the mode
In a bell-shaped distribution, explain the values of mean, median, and mode
There are no differences b/w the three values
The median of a set of data is more representative than the mean when the mean is larger than most of the observations. (TRUE OR FALSE)
True
How do you get the sum of observations using mean and observations?
Value of mean * number of observations = sum of observations
The average score for a class of 30 students was 75. The 15 male students in the class averaged 70. *The 15 female students in the class averaged:*
80 (HINT: how do you find the sum of observations with the numbers given)
Which of the following statements is true? (A) When the distribution is positively skewed, mean < median < mode. (B) When the distribution is negatively skewed, mean > median > mode. (C) When the distribution is symmetric and unimodal, mean = median = mode. (D) When the distribution is symmetric and bimodal, mean = median = mode.
C (When the distribution is symmetric and unimodal, mean = median = mode.)
A data sample has a mean of 107, a median of 122, and a mode of 134. The distribution of the data is positively skewed (TRUE OR FALSE)
False
Which measure of central location is not (most least) sensitive to extreme values?
Median
Which measure(s) of central location is/are meaningful when the data are ordinal?
Median and mode