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Earn +20 ptsQ: Was there ever Sigma Mu Sigma at Lynchburg College?
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What amount spent on books has a standardized score equal to 0.5 if the mean amount spent was 300 and the standard deviation is 100?
The formula for Z-Score is: (x-mu)/sigma. We know from the information given that Z=0.5, mu=300 & sigma=100. Solve for x and plug in the values. X=Z*sigma+mu; x=0.5*100+300 or x=350. So, $350 is amount spent on books.
Find P 9 x 15 when mu equals 12 and sigma equals 2?
0.8664
In a normal distribution with mu equals 25 and sigma equals 6 what number corresponds to z equals 3?
Z = (x-mu)/sigma or 3 = (x - 25)/6 or 18 = x - 25 or x = 42. So, for Z = 3, x = 42.
The area under a normal curve with mu equals 15 and sigma equals 2 is?
It's just rock and roll...
How do you find a z-score?
Z Score is (x-mu)/sigma. The Z-Score allows you to go to a standard normal distribution chart and to determine probabilities or numerical values.
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