Supposed you are buying a triple deck ice cream cone with vanilla,strawberry,and chocolate as possible flavors. The flavors can
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Answer:
The probability that their mean life will be longer than 13 years = .9943 or 99.43%
Step-by-step explanation:
Given -
Mean = 15 years
Standard deviation = 3.7 years
Sample size ( n ) =22
Let be the mean life of manufacturing items
the probability that their mean life will be longer than 13 years =
=
=
= Using Z table
= 1 - .0057
= .9943
Answer:
Step-by-step explanation:
Substituting x=5z,