Question 1200355
**1. Calculate the z-score:**

* z = (X - μ) / σ 
* where:
    * X is the value we're interested in (71)
    * μ is the mean (60)
    * σ is the standard deviation (11)

* z = (71 - 60) / 11 
* z = 11 / 11
* z = 1

**2. Find the proportion using a z-table:**

* Look up the z-score of 1 in a standard normal distribution table (also known as a z-table). 
* The z-table gives the area under the curve to the left of the z-score.

* For z = 1, the area to the left is approximately 0.8413.

**3. Interpret the result:**

* This means that approximately 84.13% of the measurements in the distribution are less than 71.

**Therefore, the proportion of measurements less than 71 is approximately 0.8413 or 84.13%.**