0150 670 0012 180 1653 430 0136 680 0011 190 1496 440 0123 690 0010 200 1353

# 0150 670 0012 180 1653 430 0136 680 0011 190 1496 440

This preview shows page 4 - 7 out of 7 pages.

.0150 6.70 .0012 1.80 .1653 4.30 .0136 6.80 .0011 1.90 .1496 4.40 .0123 6.90 .0010 2.00 .1353 4.50 .0111 7.00 .0009 2.10 .1255 4.60 .0101 2.20 .1108 4.70 .0091 2.30 .1003 4.80 .0082 2.40 .0907 4.90 .0074 2.50 .0821 5.00 .0067 a. The probability that any given unit will operate for at least (1) 43 months, (2) 54 months, (3) 60 months. (Use the "Probability" values to 1 decimal place for intermediate calculations.) T e - T /MTBF (1) 43 (2) 54 (3) 60 b. The probability that any given unit will fail sooner than (1) 33 months, (2) 16 months, (3) 5 months. (Use the "Probability" values to 1 decimal place and other values to 4 decimal places for intermediate calculations.) T e - T /MTBF (1) 33 (2) 16 (3) 5 c. The length of service time after which the percentage of failed units will approximately equal (1) 55 percent, (2) 85 percent, (3) 90 percent, (4) 98 percent. (Use the
"Probability" values to 1 decimal place and other values to 4 decimal places for intermediate calculations. Round your final answers to the nearest whole number) 1− e - T /MTBF T (whole months) (1) 55% (2) 85% (3) 90% (4) 98% Problem 4S-18 A major television manufacturer has determined that its 19-inch color TV picture tubes have a mean service life that can be modeled by a normal distribution with a mean of 8 years and a standard deviation of 1.5. What service period would achieve an expected wear-out rate of Use Table A and Table B . a. 3 percent? (Round your answer to 2 decimal places.) Service period yr b. 5 percent? (Round your answer to 2 decimal places.) Service period yr
Problem 4S-15 Planetary Communications, Inc., intends to launch a satellite that will enhance reception of television programs in Alaska. According to its designers, the satellite will have an expected life of four years. Assume the exponential distribution applies.

#### You've reached the end of your free preview.

Want to read all 7 pages?

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern