Answer :

Final answer:

In this case, the percentage of all values with a z-score greater than or equal to 1.57 is approximately 5.82%.

Explanation:

To find the percentage of all values in a normal distribution for a given z-score, we can use a standard normal distribution table or a calculator.

In this case, we need to find the percentage for a z-score greater than or equal to 1.57.

Using a standard normal distribution table, we can find the area to the left of 1.57, which is approximately 0.9418.

To find the percentage of values to the right, subtract this area from 1:

1 - 0.9418 = 0.0582.

So, the percentage of all values with a z-score greater than or equal to 1.57 is approximately 5.82%.

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