A pollster asked 1000 adults whether Republicans or Democrats have better domestic economic policies. The following table gives thetwo-way classification of their opinions.Gender Republicans Democrats No OpinionMaleFemale204186P(Democrat | Female) = i351Since P(Democrat | Female)18920Are the events "Democrat" and "Female" independent or dependent? Detail the calculations you performed to determine this (roundyour answer to three decimal places).P(Democrat) =50P(Democrat), the eventsindependent.

Data given Gender Republicans Democrats No opinion Male 204 351 20 Female 186 189 50

Answered: A pollster asked 1000 adults whether…

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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Childhood obesity: A national health survey weighed a sample of 535 boys aged 6 - 11 and found that 83 of them were overweight. They weighed a sample of 474 girls aged 6 - 11 and found that 70 of them were overweight. Can you conclude that the proportion of boys who are overweight is greater than the proportion of girls who are overweight? Let p1 denote the proportion of boys who are overweight and let p2 denote the proportion of girls who are overweight. Use the =α0.05 level of significance and the critical value method with the table. (a) State the appropriate null and alternate hypotheses. (b) Compute the value of the test statistic. (c) State a conclusion at the =α0.05 level of significance.
A survey asked participants if they liked vanilla ice cream, chocolate ice cream, both, or neither. Of those surveyed, 44% liked vanilla, 68% liked chocolate, and 19% liked neither. What percentage of the students liked both vanilla and chocolate? (1) 17% (3) 27% (2) 22% (4) 31%
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You gather data from two local churches about the average offering (a monetary donation to the church)that is collected at a weekly service. You want to see whether the average offering given at one churchis the same as the average offering at another church. The number of people who attend Church 1 is201, and the average amount offered is $12.50. The number of people who attend Church 2 is 350, andthe average amount offered is $11.87. The sample standard deviations for Church 1 and Church 2 are$3.15 and $4.57, respectively. (a) What is the hypothesis you want to test? (b) Calculate the test statistic and test your hypothesis at the 95 and 99 percent confidence levels. (c) Pretend that the sample means and standard deviations remain the same, but that the numberof people sampled at Church 2 was 201 instead of 350. Does your test-statistic change? Does the critical value change?
K A university conducted a survey of 387 undergraduate students regarding satisfaction with student government. Results of the survey are shown in the table by class rank. Complete parts (a) through (d) below. Click the icon to view the table. 美 Data table Satisfied Neutral Not satisfied Total Freshman Sophomore Junior Senior 51 48 62 59 28 20 18 13 23 21 18 26 102 89 98 98 Total D₁ 220 79 88 387
The rating is the percentage of households with TV sets that watched the program. Top Rated TV Programs: 2007-2008 Top Rated TV Programs: 2012-2013 Program Rating Program Rating Survivor: China 9.0 How I Met Your Mother 3.7 Without a Trace 8.8 Family Guy 3.6 The Moment of Truth 8.8 Once Upon a Time 3.6 Two and a Half Men 8.5 Survivor: Philippines 3.5 60 Minutes 8.4 X-Factor Wednesday 3.5 Criminal Minds 8.2 NCIS: LA 3.4 7.9 American Idol - Tuesday American Idol - Wednesday 16.1 15.9 NBC Sunday Night Football Big Bang Theory 6.2 Send data Excel Part 1 of 2 (a) Find the population standard deviation of the ratings for 2007-2008. Round the answer to at least two decimal places. The population standard deviation of the ratings for 2007-2008 is %. Part 2 of 2 (b) Find the population standard deviation of the ratings for 2012-2013. Round the answer to at least two decimal places. Espar 昆 M
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A group of 175 college students who took math last term were interviewed. They were asked whether they passed their math course and whether they live on campus. Their responses are summarized in the following table. Passed math Failed math Live on campus 49 21 Live off campus 28 77 ? |(a) What percentage of the students passed math? 1% |(b) What percentage of the students live on campus? % |(c) What percentage of the students who live on campus passed math? [% |(d) Is there evidence that students who live on campus tend to pass math more often than average? O No, because the percentage found in part (c) is about the same as the percentage found in part (a). O No, because the percentage found in part (c) is about the same as the percentage found in part (b). O Yes, because the percentage found in part (c) is much greater than the percentage found in part (a). O Yes, because the percentage found in part (c) is much greater than the percentage found in part (b).
Saved Help Save There are four radio stations in Midland, The stations have different formats (hard rock, classical, country and western, and easy listening), but each is concerned with the number of minutes of music played per hour. From a sample of 10 hours from each station, the following sample means were offered: X = 52.77 X = 50.56 a. Determine SST. (Round the final answer to 3 decimal places.) X; = 45.76 X = 48.58 ss total - 647.000 84 SST = b. Determine SSE. (Round the final answer to 3 decimal places.) SSE c. Complete an ANOVA table. (Round the Ss, MS, and Fvalues to 3 decimal places.) ANOVA Source of DF Variation Treat Error Total The following hypotheses are given. Ho: H1=42 - H3 - 4 H: The means are not all equal. d. State the decision rule for 0.05 significance level. (Round the final answer to 2 decimal places.) Reiect Ho if F>
A fundraiser is offering a small gift to people making a donation. The donor can choose one of four gifts: a mug, a t-shirt, a plush toy, or a water bottle. The fundraiser would like to know if any of the gifts were more or less popular or were they equal in preference. The data for n= 40 donors are below:

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