QUESTION 6 A certain machine makes electrical resistors having a mean resistance of 50 ohms and a standard devlation of 4 oims. Assuming that the resistance follows a normal distribution and can be measured to any degree of accuracy, what percentage of resistors will have a resistance exceeding 59 ohms'? O 28.77 % O 71.23 % O 1.22 % O 98.78 %

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TO0.982
O 0.8854
O0.8990
O0.8143
QUESTION 6
A certain machine makes electrical resistors having a mean resistance of 50 ohms and a standard deviation of 4 dtims. Assuming that the
resistance follows a normal distribution and can be measured to any degree of accuracy, what percentage of resistors will have a resistance
exceeding 59 ohms'?
O 28.77 %
O 71.23 %
O 1.22 %
O 98.78 %
A research worker wants to determine the average time it takes a mechanic to rotate the tires of a car, and she wants to be able to asse
confidence that the mean of her sample is off by at most 0.4 minutes. If she can presume from past experience that the actual time fol
distribution with a standard deviation of 1.3 minutes, how large the sample will she have to take?
QUESTION 7
71
58
Transcribed Image Text:- Question Completion Status: TO0.982 O 0.8854 O0.8990 O0.8143 QUESTION 6 A certain machine makes electrical resistors having a mean resistance of 50 ohms and a standard deviation of 4 dtims. Assuming that the resistance follows a normal distribution and can be measured to any degree of accuracy, what percentage of resistors will have a resistance exceeding 59 ohms'? O 28.77 % O 71.23 % O 1.22 % O 98.78 % A research worker wants to determine the average time it takes a mechanic to rotate the tires of a car, and she wants to be able to asse confidence that the mean of her sample is off by at most 0.4 minutes. If she can presume from past experience that the actual time fol distribution with a standard deviation of 1.3 minutes, how large the sample will she have to take? QUESTION 7 71 58
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