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Hogar Banco de preguntas Matemáticas Estadísticas Archive 2024 December 20

Statistics Questions from Dec 20,2024

Browse the Statistics Q&A Archive for Dec 20,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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S. 14 Compare ratios: word problems zirt Brad and Lena are recording their classmates' eye color for a statistics assignment. In Brad's class, 3 out of the 25 students have green eyes. In Lena's class, 2 out of the 20 students have green eyes. Which class has the greater ratio of green-eyed students to total students? Brad's class has the greater ratio. Lena's class has the greater ratio. Neither. The classes have the same ratio. Submit A restaurant critic reviewed restaurants in Oxford and Fairview. In Oxford, the critic gave 18 negative reviews and 33 positive reviews. In Fairview, 5 of the reviews were negative and 11 were positive. In which city did the restaurant critic give a lower ratio of negative reviews to positive reviews? The critic gave a lower ratio in Oxford. The critic gave a lower ratio in Fairview. Neither. The critic gave the same ratio in both cities. What is the use of the chi-square goodness of fit test? Select one. To test the difference in three or more population means To test how close the distribution of a population is to a Normal distribution To test how close the distribution of a population is to an expected distribution To test how close the distribution of a population is to a Student's t-distribution biologist is studying the composition of birds on a lake and counts 61 ducks, 17 geese, 11 cranes, 15 swans, and 6 herons. From previous studies performed around the same time of the year, she expects of the birds to be ducks, to be geese, to be cranes, to be swans, and to be herons. What are the expected and observed counts? Select one. Expected = 55 ducks, 25 geese, 13 cranes, 11 swans, and 6 herons Observed = 61 ducks, 17 geese, 11 cranes, 15 swans, and 6 herons Expected = 61 ducks, 17 geese, 11 cranes, 15 swans, and 6 herons Observed = 55 ducks, 25 geese, 13 cranes, 11 swans, and 6 herons Expected = 55 ducks, 25 geese, 13 cranes, 11 swans, and 6 herons Observed = 55 ducks, 25 geese, 13 cranes, 11 swans, and 6 herons Expected = 61 ducks, 17 geese, 11 cranes, 15 swans, and 6 herons Observed ducks, 17 geese, 11 cranes, 15 swans, and 6 herons A university conducted a survey of its recent graduates. The university wanted to measure the quality of a new Engineering course. A survey was conducted during the first offering of the course to evaluate its overall quality. The results of the survey are shown below: Needs Improvement: Meets Expectations: Excellent: The university made improvements to the course earlier this year. Then it conducted another survey to evaluate how these improvements worked. A total of 500 students were surveyed. Their results are shown below: Needs Improvement: 175 students Meets Expectations: 225 students Excellent: 100 students You want to perform a chi-square test for goodness of fit, to see if students' views have changed about the course. Which of the following Python scripts prints the P- value and test statistic for the chi-square test? Select one. A biologist is studying the composition of birds on a lake and counts 61 ducks, 17 geese, 11 cranes, 15 swans, and 6 herons. From previous studies performed around the same time of the year, she expects of the birds to be ducks, to be geese, to be cranes, to be swans, and to be herons. What are the correct null and alternative hypotheses for performing a chi-square goodness of fit test? Select one. A politician running for city council in Albuquerque wants to estimate the number of votes she'll get on election day. Her team conducts phone surveys of likely voters and ends up with 165 respondents. State the population for this example. All likely voters in Albuquerque The 165 survey respondents The New Mexico population The US population Find the range of the following data set: 51 8 7 11 A teacher wanted to study the results from a particular exam and decided to grab all exams from students in the front row and students in the back row. What type of sampling is this? Simple Random O Cluster Systematic Stratified The following list gives the number of public libraries in each of 8 cities. Send data to calculator Find the modes of this data set. If there is more than one mode, write them separated by commas. If there is no mode, click on "No mode."
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