Respuesta :
Answer:
z-score for Emily's exam grade is 2.50
Step-by-step explanation:
Z score helps to determine position of any observed data with respect to mean of data, when it is measured in terms of standard deviation.
Formula for z score is given by
z = (data from sample - mean)/ standard deviation
Given in the problem
mean = 82
standard deviation = 4.0
sample score = 92
Z = (92-82)/4 = 10/4
Z = 2.5
z-score for Emily's exam grade is 2.50
The z-score of Emily's exam grade is 2.50.
Calculation of the z-score:
The z-score means the score that applied for measuring the position of the data related to the mean
Since the mean is 82, the standard deviation is 4.0 and the sample size is 92
Now the z-score should be
[tex]Z = (92-82)\div 4 = 10\div 4[/tex]
Z = 2.5
Hence, the z-score for Emily's exam grade is 2.50
Learn more about sample here: https://brainly.com/question/9222927
