statistics
posted by Laly .
Answer the following:
What does it mean to say that x = 152 has a standard score of +1.5?
What does it mean to say that a particular value of x has a zscore of 2.1?
In general, what is the standard score a measure of?

standard score = z
z = (xmean of whole population)/sigma of whole population
In other words z measures how many standard deviations your data point x is away from the mean of the population.
z = 1.5 means your data point x is 1.5 standard deviations bigger than the average of the population
z = 2.1 means your data point is 2.1 standard deviations below the mean.
Respond to this Question
Similar Questions

Statistics
Students were given an exam with 300 multiplechoice questions. The distribution of the scores was normal and mean was 195 with a standard deviation of 30. What were the scores of the students who were within one standard deviation … 
Statistics
In terms of the mean and standard deviation: What does it mean to say that a particular value of x has a standard score of +2.1? 
Math
Score Percentile Score Percentile Score Percentile Score Percentile 3.5 0.02 1 15.87 0 50 1.1 86.43 3 0.13 0.95 17.11 0.05 51.99 1.2 88.49 2.9 0.19 0.9 18.41 0.1 53.98 1.3 90.32 2.8 0.26 0.85 19.77 0.15 55.96 1.4 91.92 2.7 … 
statistics
So if a depression scale has 30 items in it, and if an individual gets a score of 20 what does this mean? 
statistics
So if a scale has 30 items in it, and if an individual gets a score of 20 what does this mean? 
statistics
. In terms of the mean and standard deviation:  What does it mean to say that a particular value of x has a standard score of +1.5? 
statistics
. In terms of the mean and standard deviation:  What does it mean to say that a particular value of x has a standard score of +1.5? 
statistics
say that you have a distribution of exam scores with a mean of 57 and a standard deviation of 7. if a student in the class has a standard score equal to 2.429, what would their raw score on the exam be? 
Statistics
A researcher performs a hypothesis test to test the claim that among girls aged 910, the mean score on a particular aptitude test differs from 72, which is the mean score for boys of the same age. Data were collected from a random … 
Statistics
A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value?