Answer:
A student must obtain a grade of at least 84.2 in order to get an A.
Step-by-step explanation:
Problems of normally distributed samples can be 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:
If only the best 14 % of the students in the class will receive an A, what grade must a student obtain in order to get an A?
This is the value of X when Z is in the (100-14) = 86th percentile.
So it is the value of X when , and higher values of X. So
A student must obtain a grade of at least 84.2 in order to get an A.
Yes that’s the answer so i hope appreciate the answer
Four hundred-thousand plus sixty-thousand plus five-thousand plus one-hundred.
Answer:
If he is traveling over 85 miles its cheaper to use company a
Step-by-step explanation:
137-65= 72
72÷0.85= 84.7058823529= 85
So after 85 miles company A is cheaper