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