How many standard deviations calculator
[DOC File]PROBABILITY TOPICS: HOMEWORK
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the population standard deviation, σ . iii. the weight that is 2 standard deviations below the mean. iv. When Steve Young, quarterback, played football, he weighed 205 pounds. How many standard deviations above or below the mean was he? That same year, the average weight for the Dallas Cowboys was 240.08 pounds with a standard deviation of 44 ...
[DOCX File]Calculating the Standard Deviation - Anne Gloag's Math Page
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Calculating the Standard Deviation. If x is a number, then the difference "x - mean" is called its deviation. In a data set, there are as many deviations as there are items in the data set. The deviations are used to calculate the standard deviation. If the numbers belong to a population, in symbols a deviation is x − μ .
[DOC File]Standard deviation - 物理系
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Their standard deviations are 7, 5, and 1, respectively. The third set has a much smaller standard deviation than the other two because its values are all close to 7. In a loose sense, the standard deviation tells us how far from the mean the data points tend to be.
[DOC File]AP Statistics TI 83/84 Calculator functions
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Remember in this case that you have to use the appropriate formula for standard deviation. It can also be used if you are using the normal approximation for the binomial distribution. Example: Heart rates are normally distributed with mean of 72 and a standard deviation of 8.
[DOC File]Normal Curve Percentages
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In fact, for any number (or fraction) of standard deviations, we know exactly what percent of the data fall within that number of standard deviations of the mean. For example, consider the normal curve percentages in the table below. Given a number z of standard deviations, the table gives the percent of data values between the mean ( and ((z(.
[DOC File]Standard Deviation/Standard Score Correspondence
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Standard Deviation/Standard/Scaled Score Correspondence Standard Deviation (SD) Standard Score Scaled Score 2 SD above mean 130 or above 16 or above 1 SD above mean Between 115 and 130 Between 13 and 16 Within 1 SD of mean Between 85 and 115 Between 7 and 13 1 SD below mean Between 70 and 85 Between 4 and 7 1.5 SD below mean 77.5 5.5 2 SD below ...
[DOC File]Section 1
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Logic: If the sample mean is too many standard deviations from the mean stated in the null hypothesis, then we reject the null hypothesis (accept the alternative) P-Value Logic: Assuming H0 is true, if the probability of getting a sample mean as extreme or more extreme than the one obtained is small, then we reject the null hypothesis (accept ...
[DOC File]Z-Score Practice Worksheet
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How many standard deviations is that? 3.75. Convert Einstein’s IQ score to a z score. (160 – 100)/16 = 3.75. If we consider “usual IQ scores to be those that convert z scores between -2 and 2, is Einstein’s IQ usual or unusual? Unusual. Women’s heights have a mean of 63.6 in. and a standard …
[DOCX File]Year 12 Mathematics Standard 2 – MS-S5 The Normal …
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The z-score indicates how many standard deviations away from the mean the score is. For example, a z-score of -2 should be interpreted as a score which is 2 standard deviations below the mean. The z-score distribution is normally distributed with a mean μ=0 and standard deviation σ=1
[DOC File]STATISTICS IS THE STUDY OF DATA - De Anza College
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CHAPTER 2: Calculator Instructions for TI-83 and TI-84 Calculators. ... It describes the location of a data value as "how many standard deviations above or below the mean" EXAMPLE 24: In the 6th week of class, the 20 students had the quiz grades below. Anya's quiz grade was 18.
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