Game consoles: A poll surveyed 341 video gamers, and 72 of them said that they prefer playing games on a console, rather than a computer or hand-helddevice. An executive at a game console manufacturing company claims that less than 27% of gamers prefer consoles. Does the poll provide convincing evidencethat the claim is true? Use the α = 0.01 level of significance and the P-value method with the TI-84 Plus calculator.Part: 0 / 4Part 1 of 4(a) State the appropriate null and alternate hypotheses.Ho:H₁:This hypothesis test is a (Choose one) ▼ test.ロ<ロ0*0X□<口Р0=0

A survey of 341 video gamers of which 72 of them said that they prefer playing games on a console.

Answered: Game consoles: A poll surveyed 341…

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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A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Five hundred people are screened at a clinic during the first year the new test is implemented. Assume the true prevalence of Lyme disease among clinic attendees is 10%. Calculate the predictive value of a positive test.
Bruce was reading an article. In the Methods section it said that a within subjects ANOVA was carried out. In the Results section, he saw that an SPSS phrase, F (8, 192) = 23.00, p < 0.05. How many levels of the factor did the study have?\
You may need to use the appropriate appendix table or technology to answer this question. Of 290 female registered voters surveyed, 119 indicated they were planning to vote for the incumbent president. Of 425 male registered voters, 157 indicated they were planning to vote for the incumbent president. (a) Compute the test statistic. (Use female male. Round your answer to three decimal places.) (b) At a = 0.01, test to see if there is a significant difference between the population proportions of females and males who plan to vote for the incumbent president. (Use the p-value approach.) Calculate the p-value. (Round your answer to three decimal places.) p-value = What is your conclusion? O Do not reject Ho. We can conclude that there is a significant difference between the two poplation proportions. O Do not reject Ho. We cannot conclude that there is a significant difference between the two population proportions. O Reject Ho. We cannot conclude that there is a significant difference…
On average, a sample of n = 36 scores will provide a better estimate of the population mean than a sample of n = 49 scores from the same population.
Generally speaking, would you say that most people can be trusted? A random sample of n1 = 253 people in Chicago ages 18-25 showed that r1 = 41 said yes. Another random sample of n2 = 283 people in Chicago ages 35-45 showed that r2 = 74 said yes. Does this indicate that the population proportion of trusting people in Chicago is higher for the older group? Use α = 0.05. (a) What is the level of significance? What is the value of the sample test statistic? (Test the difference p1 − p2. Do not use rounded values. Round your final answer to two decimal places.)(c) Find (or estimate) the P-value. (Round your answer to four decimal places.)
A sample of 323 urban adult residents of a particular state revealed 65 who favored increasing the highway speed limit from 55 to 65 mph, whereas a sample of 177 rural residents yielded 75 who favored the increase. Does this data indicate that the sentiment for increasing the speed limit is different for the two groups of residents? (a) Test H0: p1 − p2 = 0 versus Ha: p1 − p2 ≠ 0 using ? = 0.05, where p1 refers to the urban population. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value = State the conclusion in the problem context. Fail to reject H0. The data suggests that the sentiment for increasing the speed limit is different for the two groups of residents.Reject H0. The data suggests that the sentiment for increasing the speed limit is different for the two groups of residents. Fail to reject H0. The data does not suggest that the sentiment for increasing the speed limit is different for the two groups of…
The wrong alternative. One of your friends is testing the effect of drinking coffee on the duration of cold symptoms. The common cold lasts, on average, 6 days. Your friend starts with no expectations as to whether drinking coffee will have any effect on cold duration. After seeing the results of the experiment, in which the average cold duration was less than 6 days, your friend tests a one-sided alternative about the population mean cold duration when drinking coffee, H0: lcoffee = 6 На: Which gives a one-sided P value P = 0.0465. Explain why your friend should have used a two-sided hypothesis. Hcoffee < 6
Many university admission committees use the GMAT score as one of the critical indicators of how well a student is likely to perform in an MBA program. However, the GMAT might not be a very strong indicator for all MBA programs. Suppose that an MBA program designed for middle managers who wish to upgrade their skills was launched 3 years ago. To judge how well the GMAT scores predict MBA performance, a sample of 12 graduates was taken. Their GPA in the MBA program (values 0 to 12) and their GMAT scores (values ranging from 200 to 800) are listed below. Compare the covariance and the correlation coefficient. Interpret your findings. GMAT GPA 599 9.6 689 8.8 584 7.4 631 10.0 594 7.8 643 9.2 656 9.6 594 8.4 710 11.2 611 7.6 593 8.8 683 8.0

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