You randomly select and measure the contents of 10 bottles of cough syrup.The results (in fluid ounces) are shown to the right.4.21717 4 295 4255 4.246 4.188 O4.265 4.266 4.249 4.229 4.239Assume the sample is taken from a normally distributed population. Construct 95% confidence intervals for (a) the population varianceo and (b) the population standard deviation o. Interpret the results(a) The confidence interval for the population variance is (.)(Round to six decimal places as needed.)

The provided sample observations of the contents of cough syrup bottles are:4.217, 4.265, 4.295,…

Answered: You randomly select and measure the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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rary > MAT 240: Applied Statistics home > pothesis tests for the difference between two population means A company that develops an automated customer service model is interested in knowing whether two versions, Version A and Version B, will get different ratings from customers. Participants in a focus group are taken through samples from both versions, then take a survey to rate each version. A summary of the data obtained from the study is given below. Assume ratings from the different surveys generally have the same standard deviation. Version A Version B Mean 39.333 34.4 Observations Pearson Correlation -0.011 0 Hypothesized Mean Difference -2.086 P(T H
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You work for a soft-drink company in the quality control division. You are interested in the standard deviation of one of your production lines as a measure of consistency. The product is intended to have a mean of 12 ounces, and your team would like the standard deviation to be as low as possible. You gather a random sample of 15 containers. Estimate the population standard deviation at a 80% level of confidence. 11.86 12.12 12.2 12.08 12.06 12.09 11.92 12.26 12.04 12.1 11.85 11.97 11.85 12 12.01 (Data checksum: 180.41) Keep as many decimals as possible while making these calculations. a) Find the sample standard deviation: b) Find the lower and upper χ2χ2 critical values at 80% confidence:Lower: Upper: c) Report your confidence interval for σσ:
Baseball Team Batting Averages Team batting averages for major league baseball in a certain year are represented below. Find the variance and standard deviation for each league. Compare the results. Round the answers to five decimal places for variance and four decimal places for standard deviation. National League 0.252-0.256 0.257-0.261 0.262-0.266 0.267-0.271 0.272-0.276 Send data to Excel Bart: 02 7 3 2 2 2 American League 0.256-0.261 0.262-0.267 0.268-0.273 0.274-0.279 0.280-0.285 2 4 7 FAD 00 8 → 民團』。 B M dh
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A business department is trying to determine if their program is competitive. They survey recent graduates from their program and compare their recent grads' starting salary to the national average of recent graduates ($48,000 a year). One-Sample Statistics Std. Std. Error Mean Deviation Mean I Incom 84 50,633.333 8,314.7474 1,100.3179 e 4 One-Sample Test Test Value = 48,000 %3D 95% Confidence Interval of the Mean Difference Sig. (2- tailed) Differenc df Lower Upper e Incom 2.144 83 .041 2,633.33 270.923 6,555.74 e 333 9. 28 a) What are the results of this analysis? Write an APA-style statement describing these data as though it were a research report. b) Do you think these results are practically significant? Why or why not? 1,537 words 3.
You work for a soft-drink company in the quality control division. You are interested in the standard deviation of one of your production lines as a measure of consistency. The product is intended to have a mean of 12 ounces, and your team would like the standard deviation to be as low as possible. You gather a random sample of 18 containers. Estimate the population standard deviation at a 80% level of confidence. 12.08 12 12.1 11.98 12.1 12.09 11.91 12.01 11.95 12.12 12 12.1 11.97 11.95 12.07 12.1 11.96 12.02 Note: Keep as many decimals as possible while making these calculations. If possible, keep all answers exact by storing answers as variables on your calculator or computer. a) Find the sample standard deviation: b) Find the lower and upper χ2 critical values at 80% confidence:Lower: Upper: c) Report your confidence interval for σ: ( , )
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Summary statistics for Chol: (a) Calculate a 95% confidence interval (Chapter 17) for the mean Cholesterol of heart disease patients. Use the t-distribution table and the Cholesterol summary statistics.Group by: HD HD n Mean Variance Std. dev. Std. err. Median Range Min Max Q1 Q3 No 164 242.64024 2857.606 53.45658 4.1742576 234.5 438 126 564 208.5 267.5 Yes 139 251.47482 2448.9468 49.486835 4.1974185 249 278 131 409 217 284

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