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mean+0.67*SD (*standard*** deviation**). According to z table, z equal to 0.67 when probability is 0.75. Therefore, we can calculate quantity for each style include the risk of stock out by using formulate Q*=mean+z*SD. Therefore, we can get the maximum order units for each style in order to avoid stock out.
Figure 1
|Style |Price |Average |

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9551/SQRT(300),1) = 0.0783
(c) A circuit contains three resistors wired in series. Each is rated at 6 ohms. Suppose, however, that the true resistance of each one is a normally distributed random variable with a mean of 6 ohms and a *standard*** deviation** of 0.3 ohm. What is the probability that the combined resistance will exceed 19 ohms? How "precise" would the manufacturing process have to be to make the probability less than 0.005 that the combined resistance of the circuit would exceed 19...

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the mean from part b find the *standard*** deviation** of the probability distribution.
8. A computer password consists of two letters followed by a five-digit number, none of which can be repeated. After 3 tries the computer locks down and notifies security.
a) What is the probability of guessing the correct password on the first try?
b) What it the probability of guessing the correct password within three tries?
9. Find the mean and

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order is long and uncertain. This time gap is called “lead time.” From past experience, the materials manager notes that the company’s demand for glue during the uncertain lead time is normally distributed with a mean of 187.6 gallons and a *standard*** deviation** of 12.4 gallons. The company follows a policy of placing an order when the glue stock falls to a predetermined value called the “reorder point.” Note that if the reorder point is x gallons and the demand during lead time exceeds x gallons...

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Sales Price | | Days to Sell | |
| | | | | |
Mean | 474007.5 | Mean | 454222.5 | Mean | 106 |
** Standard** Error | 31194.293 |

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in analysing the data is determining if outliers exists within the data. The presence of outliers must be evaluated because their existence could distort the data and make it inaccurate. In order to determine if outliers exist the average and *standard*** deviation** must be calculated in order to calculate the Z score, which will show, wither or not outliers exist. In this instance to outliers where found present in the data set as all of the data fell within the +3,-3 range, the largest positive outlier...

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corresponds to a 94% level of confidence.
A. 1.88
B. 1.66
C. 1.96
D. 2.33
2. In a sample of 10 randomly selected women, it was found that their mean height was 63.4 inches. Form previous studies, it is assumed that the *standard*** deviation**, σ, is 2.4. Construct the 95% confidence interval for the population mean.
A. (61.9, 64.9)
B. (58.1, 67.3)
C. (59.7, 66.5)
D. (60.8, 65.4)
3. Suppose a 95% confidence interval for µ turns out to be (120, 310). To make...

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*Standard*** Deviation** Abstract
QRB/501

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14, 14, 15, 15, 16. The mean is 14.0mm.What is the best estimate of the *standard*** deviation**?
-1mm
5 1000 bananas were collected from a single plantation and weighed.Their masses formed a normal distribution. How many bananas would be expected to be within 2

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*Standard*** deviation** can be difficult to interpret as a single number on its own. Basically, a small

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