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Mathematics 13 Online
OpenStudy (anonymous):

the mean life of a wristwatch is 25 months,with a s.d of 5 months. If the distribution is normal for how many months should a guarantee be made if the manufacturer does not want to exchange more 10% of the watches? assume the variable is normally distributed

OpenStudy (anonymous):

10% = 0.1 on the table what is z

OpenStudy (anonymous):

|dw:1348839622831:dw| |dw:1348840079773:dw| sub z and solve for x

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