joejoefofana
05.10.2019 •
Mathematics
Part a
a national achievement test is administered annelida to third graders. the test has a mean score of 100 and a standard deviation of 15. if jane z-score is 120, what was her score on the test?
part b
the grades on a history midterm at gardiner high school are normally distributed with a mean of 73 and standard deviation of 4.0. the z score for ben is 0.50. find the ben's score
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Ответ:
Step-by-step explanation:
z score= x - mean/standard deviation
1.20= x -100/15
18= x -100
118=x
z score= x - mean/standard deviation
0.5=x-73/4
2=x-73
75= x
Ответ:
22
Step-by-step explanation: