LET'S DO THIS! 1. A consumer group tested a sample of 100 light bulbs. It found that the mean life expectancy of the bulbs was 842 hours, with a standard deviation of 90. One particular light bulb from the NotSoDull Company had a z-score of 1.2. What was the life span of this light bulb? 2. Roland received a score of 70 on a test for which the mean score was 65.5- Roland has learned that the z-score for his test is 0.6. What is the standard deviation for this set of score? 3. The median monthly salary for a police dispatcher in a large city was Php 44,528.00. If the 25th percentile for the monthly salary of a police dispatcher was Php 32,761.00, find the percent of police dispatchers whose monthly salaries were a. less than Php 44.528.00. b. more than Php 32,761.00. c. between Php 32,761.00 and Php 44.528.00. 4. The following table lists the weights (in ounces) of 15 avocados in a random sample. Find the quartiles for the data. Weights of Avocados (in ounces) 12.4 10.8 14.2 7.5 10.2 11.4 12.6 12.8 13.1 15.6 9.8 11.4 12.2 16.4 14.5 5. Construct a box-and-whisker plot for the following data. Number of Rooms Occupied in a Resort during and 18-Day Period 86 77 58 45 94 96 83 76 75 65 68 72 78 85 87 02 65 61