A production manager at a wall clock company wants to test their new wall clocks. The designer claims they have a mean life of 15 years with a standard deviation of 5 years. If the claim is true, in a sample of 37 wall clocks, what is the probability that the mean clock life would differ from the population mean by greater than 1.2 years

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

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6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92