Answer: 0.050
Explanation:
Mean = 18
USL = 18.6
LSL = 17.4
SD = 1.25
Cpk = Min{(mean - LSL / 3*sd), (USL - mean / 3*sd)}
= Min{ ( 18 - 17.4/ 3 * 1.25), (18.6 - 18 / 3 * 1.25)}
= Min { 0.05 0.05)
Cpk = 0.050
Answer
The answer and procedures of the exercise are attached in the following archives.
Explanation
You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.
Answer:
A) $24,602
Explanation:
We can solve this question by finding the periodic deposits needed by using the formula:

where:
FV= future value = $220,000
PMT = periodic deposits required = ???
i = effective interest rate per period = 0.0331
n= number of deposits = 8
However, since the interest is compounded monthly, let's also calculate the effective interest rate
Effective interest rate =
where; r = 12.5% = 0.125

= 0.1324
Interest rate per period = 
= 0.0331
Then;

220,000 = PMT × 8.986
PMT = 
PMT = $ 24,482.5
Since A) $24,602 is closer to $ 24,482.5
Therefore, $ $24,602 must be deposited every three months
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