Question

4. In 2023, FICO scores had a mean of 715 and standard deviation of 42. Assuming a normal distribution, find the probability of each: a) person selected at random has a FICO score over 800. (6 pts) b) person selected at random has a FICO score less than 650 or more than 750.

          4.
In 2023, FICO scores had a mean of 715 and standard deviation
of 42. Assuming a normal distribution, find the probability of
each:
a) person selected at random has a FICO score over 800.
(6 pts)
b) person selected at random has a FICO score less than 650 or
more than 750.

4.
In 2023, FICO scores had a mean of 715 and standard deviation
of 42. Assuming a normal distribution, find the probability of
each:
a) person selected at random has a FICO score over 800.
(6 pts)
b) person selected at random has a FICO score less than 650 or
more than 750.

Added by Angela J.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Sri K

09/26/2023

Step 1

The z-score formula is: z = (X - μ) / σ where X is the FICO score, μ is the mean, and σ is the standard deviation. Show more…

Show all steps

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In 2023, FICO scores had a mean of 715 and standard deviation of 42. Assuming a normal distribution, find the probability of each: a) person selected at random has a FICO score over 800 . (6pts) b) person selected at random has a FICO score less than 650 or more than 750 . 4. In 2023, FiCO scores had a mean of 715 and standard deviation of 42. Assuming a normal distribution, find the probability of each: (6 pts) a) person selected at random has a FIcO score over 800. b) person selected at random has a FICO score less than 650 or more than 750