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Home Question Bank Math Statistics Archive 2024 November 09

Statistics Questions from Nov 09,2024

Browse the Statistics Q&A Archive for Nov 09,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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5) Suppose the adult population of a city is \( 9,823,000 \) and there are 3,340,000 people who are not in the labor force and 6,094,000 who are employed. a. Calculate the number of adults who are in the labor force and the number of adults who are unemployed. b. Calculate the labor force participation rate and the unemployment rate. 13. Una serie de camisas de iguales características valen \( 5.000,8.000,10.000,10.000 \) y 15.000 . Dados estos datos, ¿cuál (es) de las siguientes características es (son) verdadera(s)? I. La moda es 10.000 II. La mediana es 10.000 III. La media (promedio) es 9600 A) Sólo I y II B) Sólo I y III C) Sólo II y III D) 1, II y III 4. a) The data \( \left(x_{1 i}, x_{2 i}, x_{3 i}, x_{4 i}, y_{i}\right), i=1,2, \ldots, n \), is obtained on several predictor variables \( \mathbf{X} \), and a response variable \( \mathbf{Y} \). i. \( [3 \) marks] ii. If \( \mathbf{X} \) is the design matrix of predictor, state with explanation the dimensions of the matrix \( \mathbf{X} \mathbf{X} . \quad[3 \) marks] iii. Explain how the matrix in (ii) may be used in linear regression modelling and state any conditions involved. ii. State the fundamental equation of the one-way ANOVA, explaining all terms involved. [6 marks] O8-89 Interpret the slope. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. For every day absent, the final grade falls by \( \square \), on average. B. For zero days absent, the final score is predicted to be \( \square \). C. For every unit change in the final grade, the number of days absent falls by \( \square \) days, on average. D. For a final score of zero, the number of days absent is predicted to be appropriate to interpret the slope. (c) Use the regression equation to predict the head circumference of a child who is 24.75 inches tall. \( \hat{y}=\square \mathrm{in} \). (Round to two decimal places as needed.) example Get more help - 3. Los siguientes datos representan los juicios valorativos de 15 estudiantes en un colegio donde E: excelente,, S: sobresaliente, A: aceptable, I: insuficiente. \[ \text { E, S, I, A, S, E, A, I, E, A, S, S, E, I, I. } \] a. Organiza los datos anteriores en una distribución de frecuencias, encuentra la moda y la mediana e interpreta estos resultados. b. Elabora un diagrama de barras que represente la frecuencia de los datos. 2. Se realizó una encuesta sobre la preferencia del color de automóvil a 58344 personas que visitaron una feria automotriz. Los resultados son los siguientes: Gris \( (13 \%) \), azul \( (12 \%) \), blanco \( (20 \%) \), rojo \( (11 \%) \), negro \( (20 \%) \), verde \( (2 \%) \), plata \( (17 \%) \), amarillo \( (3 \%) \) y el resto café. a. Organiza la información anterior en una tabla de frecuencias b. Elabora un diagrama de barras y uno circular c. Determina la media y mediana d. Determina cuál es la moda y cuál es su interpretación para futuros colores en automóviles. Question 8 The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and mathematics, and any disabilities or special educational needs the student may have. Which of the following are categorical (or qualitative) variables in these records? \( \square \) Days Absent \( \square \) Age \( \square \) Mathematics Test Score \( \square \) Disabilities or Special Needs \( \square \) Race or Ethnicity \( \square \) Reading Test Score \( \square \) Current Grade Level \( \square \) Student Name In a study, the data you collect is: Water depth in the Willamette River. This data is: OQuantitative
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