PSM Exam 1 Questions & Answers 2024

PSM Exam 1 Questions & Answers 2024 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 - ANSWER-False A sample of n = 25 scores has mean M = 20 and variance s2 = 9. What is the sample standard deviation? - ANSWER-3 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? - ANSWER-u=60 and o=5 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 ____. - ANSWER-between 4 and 11 A sample consists of n = 16 scores. How many of the scores are used to calculate the range? - ANSWER-2 For a sample with M = 20 and s = 1, a score of X = 17 would be considered an extremely low score. - ANSWER-True 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? - ANSWER-25 Which set of scores has the smallest standard deviation? - ANSWER-145, 143, 145, 147 A positive deviation score always indicates a score that is greater than the mean. - ANSWER-True 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? - ANSWER-M=150 and S=5