(8)005.OL-TRAD-UG.22EW4/chapter/6/section/2A tolibrary > MAT 240: Applied Statistics horme > 6.2: Confidence intervals for population meansE zyBooks catalogHelp/FAQThus, the quality control department should use a sample size of 199 parts.Feedback?PARTICIPATION6.2.5: Machine output.ACTIVITYA company that manufactures tools want to estimate the average output of a machine to within a margin of error of +2.1 unitswith 90% confidence. A preliminary pilot study found that the sample standard deviation of the machine's output is 7.3 units.1) What is the preliminary estimate n*?CheckShow answer2) What is the sample sizen? The critical value when df = 32 ist* = 1.694CheckShow answerFeedback?Spreadsheet functions+66searchdyCLS144144edop()N4

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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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Make a similarity and differences of statistic and parameter using venn diagram
25. The average amount of time men and women spend practicing meditation in Nepal resort each week is believed to be the same. A study is done and data are collected, resulting in the data in the table below. Each population has a normal distribution. Is there a difference in the mean amount of time men and women practice meditation every week? Test at the 5% level of significance.(populations standard deviations are assumed unegqual). Average Number of Hours Practicing Tmeditation Per week Sample Standard Deviation Sannie Size 0.866 Women Men p-value is p = 0.0054 the df-18.8466 p-value is p =0.05, the dfe 20.8466 O p-value is p= 0.02, the df= 18.8466 p-value is p= 0 001, the df= 12.8466
1.The best fitted model2.Point prediction based on the best model3.Hypothesis Testing
A survey of 200 middle managers showed a distribution of the number of hours of exercise they participated in per week with a mean of 3.64 hours and a standard deviation of 4.76 hours. Complete parts (a) through (c) below. Question content area bottom Part 1 a) According to the Normal model, what percent of managers will exercise fewer than one standard deviation below the mean number of hours? (Round to the nearest whole number as needed.) Part 2 b) For these data, what does that mean? Explain. Select the correct choice below and fill in the answer box(es) within your choice. (Type integers or decimals.) A. One standard deviation below the mean is enter your response here hours. This means that enter your response here% of managers are exercising no more than this number of hours. B. One standard deviation below the mean is enter your response here hours. This means that enter your response here% of managers are exercising exactly this…
What is sample mean, sample median, sample mode, sample variance?
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Individual scores for practices towards COFLU-20 are found to be normally distributed with a mean of 3 and a standard deviation of 1.5 over the entire population. The Ministry of Health wishes to use this information to identify individuals whose score on practices towards COFLU20 is in the lower 75%, in order to give them relevant information on the best practices towards COFLU-20. You are asked to assist in calculating the score that the Ministry of Health should use to decide whether an individual should be given the relevant information?
A researcher was interested in whether there are differences in body image concerns between competitive vs. non-competitive athletes. Based on the forest plot below, what is your statistical conclusion? Difference in body image concerns between competitive and non- competitive athletes OA) Reject Ho Study Arroyo et al. (2008) Asci (2004) Benau et al., (2020) Di Bartolo & Shaffer (2002) Di Nucci et al, (1994) Filaire et al., (2007) Furnham et al, (1994) Hoag (2012) lacolino et al., (2017) Loosemore et al., (1989) Reinking & Alexander (2005) Robinson & Ferraro (2004) Souilliard et al., (2021) Souilliard et al., (2019) Warren et al, (1990) Wiggins & Moode (2000) Indicates lower levels of body image concerns among competitive athletes -2-1 C) Fail to Reject Ho HH Hedges g [95% CI) -0.54 (-1.08,-0.01] -0.26 [-0.40,-0.12] -0.28 [-0.53,-0.03] -0.69 (-0.97,-0.41] -1.01 [-1.52,-0.49] 2.29 [1.52, 3.06) -0.69 [-1.29,-0.09) 0.35 [0.12, 0.58]) -0.33 [-0.61,-0.05) 0.02 [-0.63, 0.67] -0.42 (-0.75,…
7. In one state, the mean time served in prison by convicted burglars is 18.7 months. A researcher would like to perform a hypothesis test to determine whether the mean amount of time served by convicted burglars in her hometown is different from 18.7 months. She takes a random sample of 11 such cases from court files in her home town and finds that = 21.4 months and s = 7 months. Use a 5% significance level to perform the test. Assume normally distributed population. Perform critical-value (classical) test. Be sure to identify the null and alternate hypotheses and interpret your results. a) Hypotheses: b) Test statistic: c) Critical-value: d) Hypothesis test conclusion and interpretation:
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a) Variance/ Standard Deviation are often used to compare the consistency of two different populations, then when and why do we use Coefficient of Variation? b) Define Quartiles, Deciles and Percentiles. And why do we need these measures? Explain their usage.

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