Answer:
The ratio of adult fish to baby fish in the tank is 2:9.
Step-by-step explanation:
Given : Stephanie has a fish tank with 10 adult fish and 45 baby fish.
To find : What is the ratio of adult fish to baby fish in the tank?
Solution :
Number of adult fish in the tank is 10.
Number of baby fish in the tank is 45.
The ratio of adult fish to baby fish in the tank is given by,
Number of adult fish : Number of baby fish
10 : 45
Converting 10 : 45 into simpler form is
Therefore, The ratio of adult fish to baby fish in the tank is 2:9.
Answer:
The score of 92 on a test with a mean of 71 and a standard deviation of 15 is better.
Step-by-step explanation:
To find which score corresponds to the higher relative position, we find the Z-score of each score.
The z-score, which measures how many standard deviation a measure is above or below the mean, is given by the following formula:
In which X is the score, is the mean and
is the standard deviation.
A score of 92 on a test with a mean of 71 and a standard deviation of 15.
So
A score of 688 on a test with a mean of 493 and a standard deviation of 150.
So
Which is better?
Due to the higher z-score, the score of 92 on a test with a mean of 71 and a standard deviation of 15 is better.