? Question 1 0 out of 10 points
The mean is more often used for inference than the median.
? Question 2 10 out of 10 points
= 0
? Question 3
10 out of 10 points
It is possible to have more than one mode in a sample of scores.
? Question 4 10 out of 10 points
If a group of 100 people has an average IQ of 107 and a group of 50 people has an average IQ of 101, the average IQ of all the people is 105.
? Question 5 10 out of 10 points
The range is equal to the highest score minus the lowest score.
? Question 6 10 out of 10 points
If one knows ? X, N, and ? X2, one can calculate both the variance and the standard deviation. It is not necessary to know the mean itself.
? Question 7 0 out of 10 points
Variability and dispersion mean the same thing.
? Question 8 10 out of 10 points
Measures of variability quantify the extent of dispersion in a set of scores.
? Question 9 10 out of 10 points
The equation for standard deviation is the same regardless of whether the scores are of a sample or a population.
? Question 10 10 out of 10 points
If one uses N instead of N ? 1 in the denominator of the equation for the sample standard deviation, one will underestimate the population standard deviation.
