Answer:
The value that represents the 90th percentile of scores is 678.
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:

Find the value that represents the 90th percentile of scores.
This is the value of X when Z has a pvalue of 0.9. So X when Z = 1.28.




The value that represents the 90th percentile of scores is 678.
Answer:
X=0
Step-by-step explanation:
In the picture above.
Hope this helps.
Percentage of cats


**cross multiply 12 and 100 which is 1200
**divide 35 into 1200
the answer is 34.3% when rounded
percentage of snakes

**cross multiply 3 and 100 which is 300
<span>**divide 35 into 300</span>
<span>

</span>the answer is 8.57%