Answer:
Devon has the lower z-score, so he ran the mile faster relative to his gender.
Step-by-step explanation:
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.
Who ran the mile faster relative to their gender?
The lower the percentile of time ran, the faster. So whoever has the lower z-score ran the mile faster.
Devon
His best time to run the mile is 6.6 minutes.
These times are approximately normal with mean 8 minutes and standard deviation 1 minute.
We have to find Z when . So
Kendall
Her best time to run the mile is 5.7 minutes.
These times are approximately normal with mean 7.5 minutes and standard deviation 2 minutes.
We have to find Z when . So
Devon has the lower z-score, so he ran the mile faster relative to his gender.
Answer:
Originally, you will <em>pay</em> $95.75 for the dog.
Step-by-step explanation:
Given:
Maintenance cost of dog after 55 months = $5,468.50
Maintenance cost of dog after 82 months = $8,053.75
To Find:
How much did you pay for the dog originally = ?
Solution:
It is stated that the maintenance cost is same from month to month
Now 82 - 55 = 27 months
For 27 we have paid
$8,053.75 - $5,468.50
$2585.25
But one month the amount paid will be
Answer:
A. One line
Step-by-step explanation:
Let rearrange the system of equations into explicit forms:
The second equation is identical to the first one, which means that there is just one line.