0
What else can I help you with?
What is a negative frequency distribution?
If most the population has many high scores, the distribution is negatively skewed. If most have many low scores, it is positively skewed
1 The average of the squared deviation scores from a distribution mean?
Variance
What is one advantage of transforming X values into z-scores?
True or False, One major advantage of transforming X values into z-scores is that the z-scores always form a normal distribution
Is it possible for more than 50 percent of the scores in a distribution to have values greater than the mean?
Yes. Consider the values 0,1,1,1,1,1,1,1,1,1 The mean is 0.9 9 out of 10 values are higher than this mean, which is obviously more than 50%.
What percentage of scores fall between 0 and -2 in a normal distribution?
2
For a normal distribution what z-score value separates the lowest 10 percent of the scores from the rest of the distribution?
-1.28
What z-score value separates the highest 10 of the scores in a normal distribution from the lowest 90?
It is 1.281551
What z-score separates the top 10 percent from the rest of the scores?
z = 1.281551
What percent of the scores in a normal distribution will fall within one standard deviation?
It is 68.3%
In a standard normal distribution about percent of the scores fall above a z-score of 3.00?
0.13
Is the median is always the point that is arithmetically exactly halfway between the highest and lowest scores of distribution?
false
How are grades curved in academic institutions?
Grades are curved in academic institutions by adjusting scores to fit a predetermined distribution, often a bell curve. This means that the highest scores may receive an A, while lower scores are adjusted accordingly to maintain a balanced distribution of grades.
The mean of a distribution of scores is the?
The mean of a distribution of scores is the average.
In a standard normal distribution about percent of the scores fall above a z score of 300?
A Z score of 300 is an extremely large number as the z scores very rarely fall above 4 or below -4. About 0 percent of the scores fall above a z score of 300.
Scores on a test are normally distributed with a mean of 61 and a standard deviation of 10.2 Find which separates the bottom 81 percent from the top 19 percent?
(X-61)/10.2=.878 X = 69.95 approximately 70
z scores?
If a random variable X has a normal distribution with mean m and standard error s, then the z-score corresponding to the value X = x is (x - m)/s.
How do you find the scores at the 60th percentile in a set of 200 scores?
You can't do this without knowing the distribution of scores.
