Stats Test 1- Normal Curve And Standard Scores

Front 1

z score

Back 1

Standard score is often called a ____.

Front 2

Standard score

Back 2

The process of determining how many standard deviations a raw score lies from the mean is called converting the raw score to ___ ____.

Front 3

standard score

Back 3

The ___ ____ associated with any particular raw score tells us how many standard deviations that raw score lies from the mean.

Front 4

Steps in solving problems using the normal curve table

Back 4

Step 1. Make a small graph with the mean and the raw score (X) of interest drawn in, Shade the area on the graph that represents the proportion you are looking for.

Step 2. Plan a strategy to get the proportion you need. Shade area portion of the graph can be found in the Prop below or Prop above column of the normal curve table in Appendix.

Step 3. Convert the raw score of interest to a standard score (z score)

Step 4. Carry out the strategy planned in Step 2. Find z score than find your right prop.

Front 5

Percentile rank
Percentile rank

Back 5

A score's _____ is the percentage (round to the nearest whole percent) of the scores in its distribution that fall below that score. So when you find the percentage scores below a given score, you are in effect finding it ____ _____.

Front 6

centile point

Back 6

A ____ ___ (or a percentile point) is the opposite side of the coin from a percentile rank. For a percentile rank you start with a raw score and found the percentage of scores in its distribution that fall below that raw score. To go the opposite direction you have to find the raw score below that which a particular portion of the other scores in the distribution will. A given _____ _____ is the raw score below which that percentage of scores will fall.

Ex. If looking for the 75th centile point in a distribution we would be looking for the score below which 75% of the scores fall.

Need to isolate the unknown (the raw score) in the equation so use:

standard score (or z score) = raw score - mean divided by SS

Front 7

s

Back 7

The average distance of all the scores in the distribution from the mean of that distribution is equaled to ____

Front 8

spread

Back 8

Need to know the mean but the most impt is how much ____ it is around the mean.