Psych Exam 2
A distribution has a mean of 60.0 and a standard deviation of 4.3. The raw score corresponding to a z score of 0.00 is
d. 60.0
In a negative relationship,
d. as X increases, Y decreases
If a distribution of raw scores is negatively skewed, transforming the raw scores into z scores will result in a _______ distribution.
d. negatively skewed
In the equation Y=bX + a, X and Y are
d. variables
After several studies, Professor Smith concludes that there is a zero correlation between body
...
In anormal curve, the inflection points occur at
a. u +/- 1sigma
The z score corresponding to the mean of a raw score distribution equals
b. 0
The proportion of scores less than z=0.00 is
b. 0.50
The standard deviation of the z distribution equals
b. 1 c. the variance of the z distribution
A scatter plot
b. is a graph of paired X and Y values
You have just received your psychology exam grade and you did better than the mean of the exam scores. If so, the z transformed value of your grade must
b. must be greater than 0.00 c. have a percentile rank greater than 50% e. must be greater than 0.00 and have a percentile rank greater than 50%
It is possible to compute a coefficient of correlation if one is given
b. two sets of measurements on the same individuals
In a normal distribution approximately ______ of the scores will fall within 1 standard deviation of the mean
c. 70%
The normal curve is
c. bell-shaped