A manufacturer has determined that a model of its washing machine has an expected life that is Exponential with a mean of four years to failure and irrelevant board burn-in period. He wants to testthe system and complete data collection. Find the probability that one of these washing machines will have a life that ends: (Note you can find the reliability of the washing machine life)

a) After an initial four years of washing machine service

b) Before four years of washing machine service are completed

c) Not before six years of washing machine service.

Answer:

a) 0.3679

b) 0.6321

c) 0.2231

Step-by-step explanation:

Given:

Mean, u= 4

/\ = 1/u

= 1/4 = 0.25

The cummulative distribution function, will be:

For x≥0,

$F(x) = 1 - e^-^0^.^2^5^X$

$P(x$

a) After an intial four years:

$P(x>4) = 1-(1-e^-^0^.^2^5^*^4^.^0)$

P(x>4) = 0.3679

b) Before four years:

$P(x$

P(x<4) = 0.6321

c) Not before 6 years:

$P(x>6) = 1-(1-e^-^0^.^2^5^*^4^.^0)$

P(x>6) = 0.2231

5 0

3 years ago

Pls help

vovikov84 [41]

4.5 miles. 1.6 times 7.2 is 4.47 which rounds up to 4.5

3 0

3 years ago

Mrs. Wing is preparing to tape up posters made by her students on the wall. She cuts tape into 1/4 foot pieces. How many 1/4 foo

Step2247 [10]

Answer:

20 pieces of tape.

Step-by-step explanation:

Okay, so first you have to realize that 1/4 of a foot means there is 4 pieces in a foot. So at this point you need to say there is 5 groups of four because 4 pieces of tape in a foot. So 5 times 4 is 20 pieces of tape.

8 0

3 years ago

27 anyone? Please help

ivann1987 [24]

Answer:

Step-by-step explanation:

Subtract 2.25 from both sides

4 0

3 years ago

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