9.1/6Identify the test statisticp-value In a study of treatments for very painful "cluster" headaches, 145 patients were treated with oxygen and 154 other patients were given a placebo consisting of ordinary air. Among the 145 patients in the oxygen treatment group, 125 were free from headaches 15 minutes after treatment. Among the 154 patients given the placebo, 28 were free from headaches 15 minutes after treatment. Use a 0.05 significance level to test the claim that the oxygen treatment is effective. Complete parts (a) through (c) below.

Answered: Image /qna-images/answer/4fe08b6b-a457-42a8-b663-42248c45342e.jpg

Answered: In a study of treatments for very…

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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In the study of 75 undergraduate students and 50 graduate students, the undergraduates had a mean reported number of hours sleeping of 6.18667 with a standard deviation of 1.04872 hrs. The graduate students had a mean of 6.42 hours with a standard deviation of 1.03194 hours. Use StatCrunch to run the t-test. What is the test statistic? What is the p-value associated with that test statistic? Give the most appropriate conlcusion in context The is evidence to support the claim that undergraduates sleep less than graduate students. Undergraudates sleep the same amount of time as graduate students. There is not evidence to reject the claim that underegraduates sleep the same amount as graduate students. We accept the claim that undergraduates sleep less than graduate students. Check Answer
The average annual miles driven per vehicle in the United States is 11.1 thousand miles, with o = 600 miles. Suppose that a random sample of 31 vehicles owned by residents of Chicago showed that the average mileage driven last year was 10.8 thousand miles. Does this indicate that the average miles driven per vehicle in Chicago is different from (higher or lower than) the national average? Use a 0.05 level of significance. What are we testing in this problem? O single mean O single proportion (a) What is the level of significance? State the null and alternate hypotheses. о Но: р3D 11.1; Hі: р> 11.1 O Ho: H = 11.1; H1: µ > 11.1 O Ho: µ = 11.1; H1: µ # 11.1 о Hо: р 3 11.1; Hi: р# 11.1 O Ho: p = 11.1; H1: p 0.500 O 0.250 < P-value < 0.500 O 0.100 < P-value < 0.250 O 0.050 < P-value < 0.100 O 0.010 < P-value < 0.050 O P-value < 0.010
Compute the p-value for a Chi-Squared Goodness of Fit Test with a sample size of 200, 6 categories and a test statistic of 12.3331. Round to the fourth
The following is a list of 14 measurements. - 13, -6, -45, 53, -3, 83, –23, 79, – 17, -96, – 18, 91, 53, – 13 Send data to calculator Send data to Excel Suppose that these 14 measurements are respectively labeled x,, x,, ..., x: (Thus, -13 is labeled x,, -6 is labeled x,, and so on.) Compute the following. 14 Σ 29х, i = 1
The processing times for cases at a certain office follow a bell-shaped model with mean 124 days and standard deviation 33 days. The processing time for a certain case was 179 days. Was this a typical processing time or was it unusually long? Typical, because it is less than 3 standard deviations away from the mean. O Unusually long, because it is more than 1 standard deviation away from the mean. Unusually long, because it is less than 3 standard deviations away from the mean. Unusually long, because it is not more than 2 standard deviations away from the mean. Typical, because it is not more than 2 standard deviations away from the mean. Typical, because it is more than 1 standard deviation away from the mean.
200 patients involves 200 particpants in comparing an experimental medication to a placebo. Each person enrolled is randomized to recieve either the experimental medication or placebo. Data is collected at the end of the study after 6 weeks. Test if there is significant difference in mean systolic blood pressures between grouos using a=0.05. Meqn of 174 standard deviation of 19.5 Mean systolic blood pressure: experimental (n= 100) 120.2 (15.4) placebo (100) 131.4 (18.9) Hypertensive (%) exp. 14 placebo 22 Side effects (%) exp. 6 placebo 8
Careful analysis of a random sample of n=16 pages of a Huge Government Document published by the Office Of Printed Statistical Information (OOPSI) revealed a mean of, 5.2 spelling and/or errors of grammar per page. The standard deviation o of the number of errors per page is 3.6. does this data provide significant evidence (at, the, 5% level) that the true mean number of errors per page is less than 7 and thus good, enough for government work? State null and alternative hypothesis, calculate the test statistic, determine the P-value, and state your conclusion.
A given distribution has a population mean, 128 and a population standard deviation, oof 5. Compute the raw, -value associated with a Z-score of 0.19.
Scores on a standard IQ Test for people aged 20 to 34 are normally distributed with mean 110 and standard deviation 25. (a) A researcher wants to select the men in the bottom 25% on this intelligence scale. How low must a man score (IQ)to be selected? (b) A researcher wants to select the men in the top 15% on this intelligence scale. How high must a man score(IQ) to be selected?
In the last quarter of 2007, a group of 64 mutual funds had a mean return of a standard deviation of 0.6% Consider the Normal model N(0.052, 0.006) for the returns of these mutual funds a) What value represents the 40th percentile of these returns? b) What value represents the 99th percentile? What's the IQR, or interquartile range, of the quarterly returns for this group of funds? SOCCE a) The value that represents the 40th percentile is%. (Round to two decimal places as needed.) b) The value that represents the 99th percentile is%. (Round to two decimal places as needed.) c) The IQR is% (Round to two decimal places as needed.)
The results of the latest writing of the LSAT (Law School Aptitude Test) showed results that were normally distributed with a mean score of 881 and a standard deviation of 50 (c) The Osgoode Hall Law School wants candidates for admission to be in the top 2% of LSAT test scores. What is the minimum test score a candidate needs to achieve to be considered for admission to this school? Our teacher is having us learn using the TI-84. I used invNorm (.02, 881, 50, RIGHT) which gave the answer 983.6874455 (round to 2 decimals so 983.69) and was incorrect. I've tried solving this question before and the answer is always close. What am I doing wrong? Thank you for your help!

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