A random sample of 103 observations produced a sample mean of 30. Find the critical and observed values of Z for the following test of hypothesis using a equals 0.05. The population standard deviation is known to be 6 and the population distribution is normal.

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$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40