Answer:
Kindly check explanation
Step-by-step explanation:
Given that:
Mean score (m) = 80
Standard deviation = 4
Acore within one standard deviation of the mean:
Zscore = ± 1
Using the relation:
Zscore = (x - mean) / standard deviation
Where x = score
±1 = (x - 80) / 4
4 = x - 80
±4 + 80 = x
x = - 4 + 80 = 76
x = 4 + 80 = 84
Scire with 1 standard deviation of the mean :
76 = 1 standard deviation below
84 = 1 standard deviation above
