1) A student's grade on an exam was transformed to a z-value which is negative. therefore, we know that he or she scored:
Choices: higher 16% of class, higher than 45% of class, above the first quartile, below the mean, lower than 16% of the class.
I think is is the lower than 16% of the class.
2) Which of one of the following sampling examples would generally lead to the least reliable statistical inferences about the population from which the sample has been selected?
A random sample selected without replacement
A random sample selected with replacement
a voluntary response sample
a systematic sample.
1) it is "below the mean" - if a Z score is negative it only tells ...
The expert examines the student's grades on an exam.