11. An electrical firm manufactures light bulbs that have a length life with normal distribution, and mean equal to 800 hours, and a variance of 6. Find the probability that a random sample of 25 light bulbs will have a sample variance S² between 3.462 and 10.745.

11. An electrical firm manufactures light bulbs that have a length life with normal distribution, and mean equal to 800 hours, and a variance of 6. Find the probability that a random sample of 25 light bulbs will have a sample variance S² between 3.462 and 10.745.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

7. If both the height and the radius of a cone are doubled, what effect does it have on the surface area and volume? The surface area is 8 times larger and the volume is 4 times larger. Both the surface area and volume are 8 times larger. The surface area is 4 times larger and the volume is 8 times larger, Both the surface area and volume are 4 times larger. CLEAR ALL Unanswered
18. If the number of healthy fish f varies as the amount a of food available, how many fish would be present when 6 Ibs. of food are available? (Assume that 120 fish corresponds to 8 Ibs. of food.)
Please help
7.) Jamari works at a greenhouse. He created a flower exhibit with the flowers listed in the table below. Flower Exhibit Type of Flower Number poppies 24 rose 12 sunflower 8. Each poppy requires 15.6 liters of water per day. How many liters of water will Jamari need?
49. 50.
Study room measures 9’0” x 15’0” Master bedroom is 12’0”x13’6”
Please solve for both parts
7. Use a change of variables to evaluate X 1.² 1.² + 8 dr. 0
11. Find the measure of RI. 6x-8-10+3x Cex-3x>10+8 6х - 8 10 + 3x 3x=10+8 M 3x=18 RI = 6
2. A and B together can finish a piece of work in 6 days. A working alone can finish it in 5 days less than B. How long will take each of them to finish the work alone? Ans. 10 and 15 days
Exam Saved Help Save & Exit Submit Suppose 42 percent of the customers at Pizza Palooza order a square pizza, 80 percent order a soft drink, and 32 percent order both a square pizza and a soft drink. Is ordering a soft drink independent of ordering a square pizza? O Yes O No er