Psych Stats- Quiz 3
Which set of scores has the smallest standard deviation?
145, 143, 145, 147
A sample consists of n = 16 scores. How many of the scores are used to calculate the range?
2
A population has a sum of the squared deviation scores, SS = 100 and a variance, σ^2 = 4. How many scores are in the population?
25
A sample of n = 25 scores has mean M = 20 and variance s^2 = 9. What is the sample standard deviation?
3
After a researcher adds 5 points to every score in a sample, the standard deviation is found to be s = 10. The original sample had a standard deviation of s = 5.
False
A sample of scores has M = 50 and s = 5. If every score in the sample is multiplied by 3, then what are the new values for the mean and standard deviation
M = 150 and s = 15
A positive deviation score always indicates a score that is greater than the mean.
True
For a sample with M = 20 and s = 1, a score of X = 17 would be considered an extremely low score.
True
For a particular sample of size n=10, the largest distance (deviation) between a score and the mean is 11 points. The smallest distance between a score and the mean is 4 points. Therefore, the standard deviation will be ____.
between 4 and 11
A population has µ = 50 and σ = 5. If 10 points are added to every score in the population, then what are the new values for the mean and standard deviation?
µ = 60 and σ = 5