If f(x + 1) = x + 2 then f(x - 1) is
1 answer:
Answer:
Step-by-step explanation:
<u>Given function</u>
f(x + 1) = x + 2
<u>Isolate [ x + 1 ] on the right-hand side</u>
f(x + 1) = x + 1 + 1
f(x + 1) = (x + 1) + 1
<u />
<u>Substitute [ x + 1 ] with x</u>
f(x) = x + 1
<u>Substitute [ x ] with [ x - 1 ]</u>
f(x - 1) = (x - 1) + 1
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Answer:
A. Your battery is likely defective since such poor performance is extremely unlikely.
Step-by-step explanation:
When the distribution is normal, we use 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.
If X is more than two standard deviations from the mean, it is considered an unlikely outcome.
In this question, we have that:
Which of the following conclusions is the most appropriate given this information?
Lasted 400 hours, so X = 400.
4 standard deviations from the mean, so unlikely.
So the correct answer is:
A. Your battery is likely defective since such poor performance is extremely unlikely.