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[DOCX File]Curly Hair Care - Home
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a. the new standard deviation and the old standard deviation will be the same. b. the new standard deviation will be twice as large as the old standard deviation. c. the new standard deviation will half the size (twice as small) as the old standard deviation. d. not enough information to answer this question. Two samples are as follows. Sample ...
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[DOC File]Normal Curve Percentages
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The Empirical Rule says that for a normal curve, approximately 68% of the values fall within 1 standard deviation of the mean in either direction, while 95% of the values fall within 2 standard deviations of the mean in either direction.
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[DOC File]CHAPTER 1
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With normally distributed data, we know that (rounded to the nearest percent) precisely 68% of the data fall within one standard deviation of the mean, and precisely 95% of the data fall within two standard deviations, etc. In fact, for any number (or fraction) of standard deviations, we know exactly what percent of the data fall within that ...
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[DOC File]Chapter 12-13 Study Guide:
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What percentage of the bulbs have lifetimes that lie within 1 standard deviation of the mean? 5. The systolic blood pressure of 18-year-old women is normally distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of 18-year-old women have a systolic blood pressure between 84 mmHg and 156 mmHg? 6. Lewis earned ...
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[DOC File]CHAPTER 1
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To investigate, 100 samples of size 90 were selected from a normal population with a mean of 299.8 and a standard deviation of 9.1 and the percentage that were within 1 SD of the mean was recorded. Use the results from the simulation below to discuss if it is possible that the population is approximately normally distributed.
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[DOC File]National Chengchi University
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94.The Empirical Rule states that the percentage of observations in a data set (providing that the data set is bell shaped) that fall within one standard deviation of their mean is approximately 75%.
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[DOC File]Math 2 with Support
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The empirical rule says that approximately what percentage of the values would be within 2 standard deviations of the mean in a bell shaped set of data? M A. 95%. Term B. 68%. C. 50%. D. almost all. B 28. The empirical rule says that approximately what percentage of the values would be within 1 standard deviation of the mean in a bell shaped ...
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[DOC File]Standard Deviation/Standard Score Correspondence
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What percentage of the data is within two standard deviations of the mean? ... he plots the distribution of times and realizes that it follows an approximately normal distribution with a mean of 1.84 and a standard deviation of .07. 1. Mr. Wilcox would really like his lap times to be consistently between 1.75 and 1.85 minutes.
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68–95–99.7 rule - Wikipedia
The percentage of values within one standard deviation of the mean are the percentage of values between +1 and −1, 84% - 16% = 68%. The percentage of values within two standard deviations of the mean are those between +2 and −2, or about 97.5% - 2.5% = 95%. The percentage within three standard deviations is about 99.87% − 0.13%, or 99.7%. 8.12. a.
finding percentages with standard deviations

Percentage within 1 standard deviation