Question

A normal distribution has = 30 and = 5.
Find the z score corresponding to x = 25.

Answer 1

The z-score corresponding to x = 25 is -1.

Step-by-step explanation:

A z-score represents the number of standard deviations a value is above or below the mean in a normal distribution. To find the z-score corresponding to x = 25 in a normal distribution with a mean of 30 and a standard deviation of 5, we can use the formula:

z = (x - mean) / standard deviation

Plugging in the values, we get:

z = (25 - 30) / 5 = -1

Therefore, the z-score corresponding to x = 25 is -1.