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Home Question Bank Math Statistics Archive 2024 November 03

Statistics Questions from Nov 03,2024

Browse the Statistics Q&A Archive for Nov 03,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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6. The mean heights of five boys is 151 cm . The height of four of them- are \( 149 \mathrm{~cm}, 148 \mathrm{~cm}, 152 \mathrm{~cm} \) and 153 cm . a) Estimate the height of the fifth boy. b) Calculate the height of the fifth boy. What is a representative sample? What is its value? A. A representative sample is a sample that is selected at random from the population of interest. It is valuable because its unbiased Iature allows descriptive statistics to be applied. B. A representative sample is a sample that is selected at random from the population of interest. It is valuable because its unbiased nature allows inferential statistics to be applied. C. A representative sample is a sample that exhibits characteristics typical of those possessed by the population of interest. It is valuable because these characteristics allow descriptive statistics to be applied. D. A representative sample is a sample that exhibits characteristics typical of those possessed by the population of interest. It is valuable because these characteristics allow inferential statistics A wind turbine turns wind energy into electricity using the aerodynamic force from the rotor blades. In 2019 , wind power accounted for 5 percent of all electricity generated in the United States. The US Geological Survey compiled a database of over 53,700 wind turbines in the country. Several variables measured for each wind turbine in the database are listed. Determine the type of data (quantitative or qualitative) recorded for each variable. (Note: A project consists of multiple wind turbines that form a single system.) Complete parts a through e. e. Number of turbines in the project A wind turbine turns wind energy into electricity using the aerodynamic force from the rotor blades. In 2019, wind power accounted for 5 percent of all electricity generated in the United States. The US Geological Survey compiled a database of over 53,700 wind turbines in the country. Several variables measured for each wind turbine in the database are listed. Determine the type of data (quantitative or qualitative) recorded for each variable. (Note: A project consists of multiple wind turbines that form a single system.) Complete parts a through e. c. Location (state/county) A wind turbine turns wind energy into electricity using the aerodynamic force from the rotor blades. In 2019, wind power accounted for 5 percent of all electricity generated in the United States. The US Geological Survey compiled a database of over 53,700 wind turbines in the country. Several variables measured for each wind turbine in the database are listed. Determine the type of data (quantitative or qualitative) recorded for each variable. (Note: A project consists of multiple wind turbines that form a single system.) Complete parts a through e. b. Hub height (measured in meters) Choose the correct answer below. A wind turbine turns wind energy into electricity using the aerodynamic force from the rotor blades. In 2019 , wind power accounted for 5 percent of all electricity generated in the United States. The US Geological Survey compiled a database of over 53,700 wind turbines in the country. Several variables measured for each wind turbine in the database are listed. Determine the type of data (quantitative or qualitative) recorded for each variable. (Note: A project consists of multiple wind turbines that form a single system.) Complete parts a through e. a. Rotor diameter (measured in meters) Is the relationship between the number of cars washed and the number of workers proportional? Complete the statement. The number of cars washed per person so the relationship is ? Explain the difference between descriptive and inferential statistics. A. Descriptive statistics are measurements that are recorded on a naturally occurring numerical scale. Inferential statistics are measurements that cannot be measured on a natural number scale; they can only be classified into one of a group of categories. B. Descriptive statistics describes sets of data. Inferential statistics draws conclusions about the sets of data based on sampling. En el problema 8.1 suponga ahora que el tamaño de muestra \( (n) \) es 25 . a) ¿Cuál es el nivel de significancia para \( c=1 \) ? ¿Para \( c=2 \) ? b) Con este tamaño de muestra existe una prueba con nivel de significancia de 0.0904 , o sea prácticamente el de la prueba en el inciso \( a \) ) del ejercicio 8 . Encuentre la regla de decisión para dicha prueba y calcule \( \alpha(0.4), \alpha(0.6), \beta(0.2), \beta(0.1) \) y \( \beta(0.05) \). En una universidad cada estudiante de liumanidades debe acreditar un curso A de matemáticas y un curso B de ciencias. En una muestra de 100 estudiantes de segundo an̂o se observó lo siguiente: 60 acreditaron \( \wedge \), 45 acreditaron \( B, 20 \) acreditaron tanto A como B . El número de estudiantes que no acreditaron por lo menos uno de A y B fueron:
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