Answer:
12%
Step-by-step explanation:
Answer:
(78, 80)
Step-by-step explanation:
Given a normal distribution :
Mean = 79 seconds
Standard deviation = 0.5 seconds
Using the empirical rule :
95% of her finishing times :
According to the empirical rule, 95% represents 2 standard deviations from the mean that is ± 2 standard deviations from the mean score or value.
Hence ;
The interval will be defined as ;
Mean ± 2(standard deviation)
79 ± 2(0.5)
79 ± 1
(79 - 1) ; (79 + 1)
78 ; 80
She bought 3 pots of paint so
3×5
4 brushes so
4×3
and 3 pastel crayons so
3×13
Then add them all together to get your answer
It doesn't ask you to solve just describe how you'd solve
So your answer is C