Final answer:
To find the proportion of a Normal distribution below a Z-score of 1.17, use a Z-table or calculator with the cumulative distribution function (CDF). The proportion is approximately 0.8790.
Step-by-step explanation:
To find the proportion of a Normal distribution below a Z-score of 1.17, you can use a Z-table or a calculator with the cumulative distribution function (CDF) of the standard normal distribution. The CDF gives the area under the normal curve to the left of a given Z-score.
Using a calculator, you can input the Z-score of 1.17 and find the corresponding cumulative probability. In this case, the proportion below a Z-score of 1.17 is approximately 0.8790.