Turn is into a decimal.............................
True mean = mean+/- Z*(SD/sqrt (n))
Where
Z = 1.96 at 95% confidence interval
Mean = 10.3 pounds
SD = standard deviation = 2.4 pounds
n= sample size = 37 packages
Substituting;
True mean range = 10.3+/- 1.96 * 2.4/Sqrt (37) =10.3+/- 0.77 = 9.53<mean<11.07
Answer:
15
Step-by-step explanation:
pemdas
multiply first 1x10=10
then add 5+10=15
A=(pg) over 2 = four times thirty over two equals 60
