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34 Cards in this Set
- Front
- Back
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What are the five step of Standard Deviation?
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1) compute the mean of all terms in the set
2) compute the difference between the mean and each term 3) square each difference from step 2 4) compute the mean of the squares 5) compute the non-negative square root of the mean from step 4 |
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How do you find a number when a percent is given?
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1) translate to an equation
2) change % to decimal 3) calculate 4) multiply by 100 |
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How do you find what percent one number is of another?
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Set up an equation:
90 is what % of 1500? 90/1500 = x/100 1500x = 9000 15x = 90 x = 90/15 or 6 |
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How do you find a percent increase?
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Compare the change to the original number, then multiply by 100
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How do you find a percent decrease?
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Compare change to original number and simplify
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When altering ratios, if p = q, the the value...
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remains unchanged.
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When altering ratios, if p > q, then the value...
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decreases.
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When altering ratios, if p < q, then the value...
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increases.
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1/2 =
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.5 = 50%
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1/4 =
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.25 = 25%
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3/4 =
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.75 = 75%
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1/10 =
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.1 = 10%
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3/10 =
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.3 = 30%
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7/10 =
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.7 = 70%
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9/10 =
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.9 = 90%
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1/3 =
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.33 1/3 = 33 1/3%
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2/3 =
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.66 2/3 = 66 2/3%
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1/6 =
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.16 2/3 = 16 2/3%
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1/6 =
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.16 2/3 = 16 2/3%
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5/6 =
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.83 1/3 = .83 1/3%
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1/5 =
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.2 = 20%
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2/5 =
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.4 = 40%
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3/5 =
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.6 = 60%
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4/5 =
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.8 = 80%
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1/8 =
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.125 = 12 1/2%
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3/8 =
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.375 = 37 1/2%
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5/8 =
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.625 = 62 1/2%
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7/8 =
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.875 = 87 1/2%
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How do you find the average of an arithmetic sequence? The median?
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The average is that of the first and last numbers in the set. The median equals the average.
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How do you find the sum of an arithmetic sequence?
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Multiply the average by the number of terms in the set.
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What is the formula for computing probability?
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Probability = the total number of ways an event can occur / the total number of possible occurances
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How do you find the missing facts needed for a given probability?
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Plug the given information into the formula and solve!
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How do you find a probability involving two or more independent events?
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Find the individual probabilities, then multiply them together.
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How do you find a probability involving dependent events?
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Calculate the different probabilities, then multiply.
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