Asked by kenneth
a random sample of the grade of 78 students is taken. what is the probability that the average grade will be between 80.3% and 82.3%?
Answers
Answered by
PsyDAG
Need a measure of central tendency (mean) and a measure of variability (standard deviation).
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z scores.
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z scores.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.