Confidence interval calculator with no mean

    • [DOCX File]Worksheet for recitation 14 STT 200, Lecture 5, Sec 23 and ...

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      Confidence interval for means: 1-α % confidence interval for the population mean μ : ̅ y ± t * S n One sample t-test for the mean tests the hypothesis . H 0 :μ= μ 0 using t= ̅ y - μ 0 S n Check conditions: Independence and Randomization Assumption. 10% condition: sample size …

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    • [DOC File]STAT101 Worksheet: Confidence Intervals

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      Find a 95% confidence interval for the population mean . A random sample of 20 married women showed that the mean time spent on housework by them was 29.8 hours a week with a standard deviation of 6.7 hours. Find a 95% confidence interval for the mean time …

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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]Interval Estimator - (or confidence interval)

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      One-Sample Test Test Value = 0 t df Sig. (2-tailed) Mean Difference 99% Confidence Interval of the Difference Lower Upper Siblings 19.498 168 .000 1.781 1.54 2.02 Large sample CIs about a …

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    • [DOCX File]www.humbleisd.net

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      Confidence Intervals ReviewName:_____. AP Statistics. Multiple Choice. 1. To determine the average spent on entertainment during a year in college, a simple random sample of 35 students is interviewed, showing a mean of $825 with a standard deviation of $240.

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    • [DOC File]MAT 155 – Lab 11

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      to find the confidence interval. You should have the following output: The confidence interval would be written like: 4.84 < μ < 6.4. 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.

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    • [DOC File]Test Three - Weebly

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      A. for a confidence level of 99%. B. for n = 15 and a confidence level of 95%. 2. A NAPA Auto Parts supplier wants information about how long car owners plan to keep their cars. A . random sample of 41 car owners results in a mean of 7 years with a standard deviation of 3.75 years. Find a 95% confidence interval for the true population mean.

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    • [DOC File]Interval Estimator - (or confidence interval)

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      Interval Estimator - (or confidence interval) a formula that tells us how to use sample data to calculate . Confidence Coefficient – probability that an interval estimator encloses the population parameter – that is, the relative frequency with which the interval estimator encloses . 99% CI

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    • [DOC File]Interval Estimator - (or confidence interval)

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      Confidence Coefficient – probability that an interval estimator encloses the population parameter – that is, the relative frequency with which the interval estimator encloses the population parameter when the estimator is used repeatedly a very large number of times. The confidence level is the confidence coefficient expressed as a percentage.

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    • [DOC File]AP Statistics - Weebly

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      After 3 years the children exposed to the special curriculum showed a mean IQ of 93.5 with a standard deviation of 19.1; the other children had a mean IQ of 84.5 with a standard deviation of 19.9. Find a 95% confidence interval estimate for the difference in mean IQs of low-birth-weight babies who receive special intervention and those who do not.

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