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The lifetime in hours of

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The lifetime of a certain smart phone battery has anunknown distribution with mean value of 8 hours and standard deviation of 2
1. 0 answers
2. asked by jacob
3. 515 views
The lifetime of a certain smart phone battery has anunknown distribution with mean value of 8 hours and standard deviation of 2
1. 1 answer
2. asked by jacob
3. 547 views
The lifetime of a disk drive head is normally distributed with a population mean of 1000 hours and standard deviation of 120
1. 1 answer
2. asked by Heather
3. 492 views
A manufacturer claims that the mean lifetime of its lithium batteries is 1400 hours. A homeowner selects 25 of these batteries
1. 2 answers
2. asked by S
3. 3,237 views
The lifetime of a SuperTough AAA battery is normally distributed with mean of 28.5 hours and standard deviation of 5.3 hours.
1. 1 answer
2. asked by Justina
3. 1,413 views
The mean lifetime of a sample of 100 light tubes is 1570 hours with a standard deviation of 80 hours test the hypothesis that
1. 1 answer
2. asked by Patrick
3. 1,352 views
The lifetime of a 2-volt non-rechargeable battery in constant use has a normal distribution with a mean of 516 hours and a
1. 0 answers
2. asked by Anonymous
3. 696 views
The lifetime of a 2-volt non-rechargeable battery in contant use has a normal distribution with a mean of 516 hours and a
1. 2 answers
2. asked by Karen
3. 680 views
The lifetime of a 2-volt non-rechargeable battery in contant use has a normal distribution with a mean of 516 hours and a
1. 2 answers
2. asked by Karen
3. 1,192 views
The lifetime of a SuperTough AAA battery is normally distributed with mean of 28.5 hours and standard deviation of 5.3 hours.
1. 1 answer
2. asked by Sav
3. 1,270 views

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