Average and standard deviation calculator
[DOC File]More with Confidence Intervals and Hypothesis Tests
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Suppose that it is known that the standard deviation is $1075. Test the hypothesis, at the 1% level, to see if the average cost of tuition is $6250. Ho: 6250; z=1.99; p-value =.047. At the 1% level there is not enough evidence to suggest that the average cost of tuition for all colleges in PA differs from $6250.
[DOC File]STAT101 Worksheet: Confidence Intervals
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The mean and standard deviation of these 10 scores were 98.44oF and 0.30oF, respectively. Construct a 95% confidence interval for the mean of all body temperatures. In a time use study 20 randomly selected managers were found to spend a mean time of 2.4 hours per day on paperwork. The standard deviation of the 20 scores was 1.30 hours.
[DOC File]CALCULATING STANDARD DEVIATION WORKSHEET
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Sep 26, 2015 · When the standard deviation is large, the scores are more widely spread on average from the mean. The . standard deviation. is calculated as the . average distance from the mean. Practice Problem #1: The junior high basketball team played ten games. Find the standard deviation for the number of baskets scored by the team for the ten games: 8, 4 ...
[DOC File]Standard deviation - 物理系
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To understand standard deviation, keep in mind that variance is the average of the squared differences between data points and the mean. Variance is tabulated in units squared. Standard deviation, being the square root of that quantity, therefore measures the spread of data about the mean, measured in the same units as the data.
[DOCX File]CALCULATING STANDARD DEVIATION WORKSHEET
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When the standard deviation is large, the scores are more widely spread out on average from the mean. The standard deviation is calculated to find the average distance from the mean. Practice Problem #1: Calculate the standard deviation of the following test data by hand. Use the chart below to record the steps.
[DOC File]STANDARD DEVIATION - St. Francis Preparatory School
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The standard deviations for both sets of scores are equal. More information is needed to determine the relationship between the standard deviations. 9. From 1984 to 1995, the winning scores for a golf tournament were 276, 279, 279, 277, 278, 278, 280, 282, 285, 272, 279, and 278. Using the standard deviation for the sample, Sx, find the percent ...
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The average run-time for stage one is 5.6 minutes with a standard deviation of 1.2 minutes. The mean run-time for stage two is 12.3 minutes with a standard deviation of 3.8 minutes, and, for stage three, the mean is 6.4 minutes with a standard deviation of 2.8 minutes. What is the mean and standard deviation of the entire process?
[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]Chapter 2: Data
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The average attendance will be (0.696)(2) = 1.392 standard deviations above average. If a team is 1 standard deviation below average in attendance, what would you predict about the number of games the team has won? The number of games the team has won will be (0.696)(1) = 0.696 standard deviations below the average wins.
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