Answer:
The cutoff for an A grade is 82.8.
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:
a. What is the cutoff for an A grade?
The top 10% of the class get an A grade. So the cutoff is the value of X when Z has a pvalue of 1-0.1 = 0.9. So it is X when Z = 1.28
The cutoff for an A grade is 82.8.
Answer:
Step-by-step explanation:
Perimeter=22.9 m
Step by step explanation
4.4+8.7=13.1+9.8=22.8
Area=19.14
Step by step explanation
4.4x8.7=38.28 divided by 2 = 19.14
Answer:
The correct answer is 8
Step-by-step explanation:
yeah I checked the answer is 8 the person who said it the chat is correct.