Which of the following is the most appropriate unit to describe the time you can drive a car based on the amount of gas?
1 answer:
You might be interested in
Answer:
21, 17, 13
Step-by-step explanation:
Find the mean of the 2 given values
mean = =
= 17
Noe find the mean of 25 and 17 and 17 and 9
mean = =
= 21 and
mean = =
= 13
Thus the 3 means are 21, 17 and 13, that is
25, 21, 17, 13, 9
Answer:
The minimum score of those who received C's is 67.39.
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:
If 69.5 percent of the students received grades of C or better, what is the minimum score of those who received C's?
This is X when Z has a pvalue of 1-0.695 = 0.305. So it is X when Z = -0.51.
The minimum score of those who received C's is 67.39.