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[DOC File]MAT 155 – Lab 11
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The 90% confidence interval for the population mean number of pups is 4.84 pups to 6.41 pups. The calculator also states the sample mean and standard deviation of the given data. Applications for Confidence Intervals for a Population Mean
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[DOC File]HOMEWORK 5A--GENDER AND STATISTICS GRADES--MEANS
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HOMEWORK 1--GENDER AND ANXIETY--SPRING, 2012 Name_____ Due at time of Quiz 1. 1. Use spreadsheet > to conduct estimation and hypothesis testing on the population mean anxiety of college male and female statistics students.
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[DOC File]Power and Sample Size Calculation - Department of Statistics
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For example, if a researcher knows that the statistics in the study follow a Z or standard normal distribution, there are two parameters that he/she needs to estimate, the population mean (μ) and the population variance (σ2). Most of the time, the researcher know one of the parameters and need to estimate the other.
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[DOC File]Statistics Calculator - My Math Genius
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Compute a 95% confidence interval for a sample of 50 items, where the mean was computed to be 20, and the population standard deviation is known to by 10. Solution: Note that since the population standard deviation is known we can use the “z” interval. Step1: make sure you are on the “confidence interval” worksheet (there are 3 worksheets)
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[DOC File]STATISTICS FINAL EXAM TOPICS AND REVIEW
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3)A random sample of 15 statistics textbooks has a mean price of $105 with a standard deviation of $30.25. Assume the distribution of statistics textbook prices is normally distributed. 4) A random sample of 35 people has an average age of 22 with a standard deviation of 2.5 years.
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[DOC File]STAT101 Worksheet: Confidence Intervals
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The National Center for Education Statistics surveyed 4400 college graduates about the lengths of time required to earn their bachelor’s degrees. The mean was 5.15 years and the standard deviation was 1.68 years. Based on the above information, construct a 98% confidence interval for the mean time required to earn a bachelor’s degree by all ...
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[DOC File]AP Statistics TI 83/84 Calculator functions
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AP Statistics TI 83/84 Calculator functions. Describing Data: 1. Stat-Edit ... This can be used to find the probability of selecting an individual from a population with a certain value or range of values. It can also be used to calculate the probability of obtaining a certain sample mean (if sigma is known) or sample proportion in reference to ...
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[DOC File]The Practice of Statistics - AP STATISTICS - AP Statistics
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Explain how the behavior of the sample mean and standard deviation are similar to the sample proportion. The mean and standard deviation of a population are parameters. What symbols are used to represent these parameters? The mean and standard deviation of a sample are statistics. What symbols are used to represent these statistics?
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[DOC File]Margin of Error Calculation
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STANDARD ERROR Purpose. Usually we have to study organisms by measuring a sample from a larger population, which usually causes sampling error. Sampling error is a ...
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[DOC File]HOMEWORK 5A--GENDER AND STATISTICS GRADES--MEANS
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2. Using the same data, conduct estimation and hypothesis testing on the difference between population mean grades of college male and female statistics students. a. The point estimate of the difference between population means is: b. The sampling standard deviation (standard error) of the differences between sample means is: c.
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Population mean calculator statistics