Can someone plz help me on 2-13
1 answer:
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Answer:
The upper 20% of the weighs are weights of at least X, which is , in which
is the standard deviation of all weights and
is the mean.
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation
, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.
Upper 20% of weights:
The upper 20% of the weighs are weighs of at least X, which is found when Z has a p-value of 0.8. So X when Z = 0.84. Then
The upper 20% of the weighs are weights of at least X, which is , in which
is the standard deviation of all weights and
is the mean.
Answer:
Step-by-step explanation:
First, divide by 4 from both sides.
Solve.
Therefore, the solutions of 4x>8 is 2.
In conclusion, the correct answer is x=2.
<h2 /><h2>Hope this helps!</h2><h2 /><h2 /><h2>Have a wonderful blessing day! :)</h2><h2 /><h2 /><h2>Good luck!</h2><h2 /><h2 /><h2>Regards!</h2><h2 /><h2 /><h2>-Charlie</h2>