the water level in a full water tank changes by the same amount each day when the tank gets a leak. the total change in the wate
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The value of z-score for a score that is three standard deviations above the mean is 3.
In this question,
A z-score measures exactly how many standard deviations a data point is above or below the mean. It allows us to calculate the probability of a score occurring within our normal distribution and enables us to compare two scores that are from different normal distributions.
Let x be the score
let μ be the mean and
let σ be the standard deviations
Now, x = μ + 3σ
The formula of z-score is
⇒
⇒
⇒
Hence we can conclude that the value of z-score for a score that is three standard deviations above the mean is 3.
Learn more about z-score here
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Answer:
1/4 or 25%
Step-by-step explanation:
The probability for rolling an odd number is 50% or because there are 3 odd numbers, (1, 3, 5) and 6 total outcomes (1, 2, 3, 4, 5, 6).
The probability for rolling two odd numbers in a row is
So, the probability of rolling an odd number twice is 25% or .