Additional Questions for POLS 203 – Social Statistics
- Identify the proportional area in a normal curve that would fall
- Below z= - 1.5 (0.0668)
- Above z= 2.3 (0.0107)
- Between the mean and z=0.32 (0.1255)
- Below z=0.70 (0.7580)
- If scores are normally distributed with a mean of 100 and a standard deviation of 10, what proportion of scores would we expect to be
- Greater than 115? (0.0668)
- Less than 75? (0.0062)
- Between 92 and 103? (0.4060)
- Greater than 120 or less than 110? (0.8641)
- In a normal distribution of 500 scores with mean 36 and s=4, how many scores would you expect to be
- Less than 40? Aprox 421
- Greater than 30? Apprix 467
- Between 35 and 38? Approx 146
- Less than 32 or greater than 35? Approx 379
- For the distribution described in question 3, what are the raw scores
- At or below 300 students would fall? 37
- Above which 250 scores would fall? 36
- Jim’s raw score is 104 in a normally distributed set of scores with mean 110 and s=8. What proportion of the distribution would you expect to have scores greater than Jim? (0.7734)
- Joe’s raw score in the distribution referred to in question 5 was 113. given a class size of 60, approximately how many individuals would you expect to have raw scores between Jim’s and Joe’s? (appprox 25)
