A variable, W, is normally distributed with a mean of 12. 68% of its observations lie between 8 and 16. The coefficient of variation of W is ________.
Answer(s): D
For a normal distribution, 68% of the observations lie within one standard deviation of the mean. Hence, the standard deviation of X equals 12-8 = 4. The coefficient of variation is then equal to standard deviation/mean = 4/12 = 0.33.
If you buy an item and pay for it with 48 monthly payments of $75, beginning next month, what was the cash price today, if interest accrues at 13% per year, compounded monthly?
Answer(s): C
The cash price would be the present value of the payments made using the specified interest rate. On the BAII Plus, press 48 N, 13 divide 12 = I/Y, 75 PMT, 0 FV, CPT PV. On the HP12C, press 48 n, 13 ENTER 12 divide i, 75 PMT, 0 FV, PV. Note that the answer will be shown as a negative number. Make sure the BAII Plus has the P/Y value set to 1.
A histogram is best described as:
A histogram is best described as a visual representation of a frequency distribution.
Samples of the wires coming off the production line were tested for tensile strength. The statistical results (in PSI) were:Mean = 500Median = 500Mode = 500Standard deviation = 40Mean deviation = 32Quartile deviation = 25Range = 240Number is sample = 100The middle 95 percent of the wires tested between approximately what two values?
Answer(s): B
95% of the observations lie between plus and minus two standard deviations from the mean, so it is 500 +/- 2 (40).
Theta Corp.'s stock is expected to appreciate 6% per year. If no dividends are paid out over the next 5 year and the current stock price is $28, what's the expected price in 5 years?
The expected price in 5 years is 28*(1.06^5) = 37.5
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a company runs its workloads on premises. the company wants to forecast the cost of running a large application on aws. which aws service or tool can the company use to obtain this information? pricing calculator ... the aws pricing calculator is primarily used for estimating future costs
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q 14 should be dmz sever1 and notepad.exe why does note pad have a 443 connection
question # 108, correct answers are business growth and risk reduction.
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question 46, the answer should be data "virtualization" (not visualization).