Estadísticas preguntas y respuestas

Smart phone: Among 251 cell phone owners aged \( 18-24 \) surveyed, 109 said their phone was an Android phone. Part 1 of 3 (a) Find a point estimate for the proportion of cell phone owners aged 18 - 24 who have an Android phone. Round the answer to at least three decimal places. The point estimate for the proportion of cell phone owners aged \( 18-24 \) who have an Android phone is 0.434 . Part: \( \mathbf{1} / \mathbf{3} \quad \) Part 2 of 3 (b) Construct a \( 99.8 \% \) confidence interval for the proportion of cell phone owners aged \( 18-24 \) who have an Android phone. Round the answers to at least three decimal places. A \( 99.8 \% \) confidence interval for the proportion of cell phone owners aged \( 18-24 \) who have an Android phone is \( \square<p<\square \).

Smart phone: Among 251 cell phone owners aged \( 18-24 \) surveyed, 109 said their phone was an Android phone. Part: \( \mathbf{0 / 3} \) Part 1 of 3 (a) Find a point estimate for the proportion of cell phone owners aged 18 - 24 who have an Android phone. Round the answer to at least three decimal places. The point estimate for the proportion of cell phone owners aged \( 18-24 \) who have an Android phone is

Question 1: Find the range for each of the following \( \begin{array}{ll}\text { (a) } 5,9,1,5,7,4,3 & \text { (b) } 6,7,10,8,9,9\end{array} \)

Identifica la moda del siguiente conjunto de datos estadísticos. \( 3.2,7.7,4.1,0.9,4.1,3.2,0.9,11.4,2.5 \), \( 7.1,7.6,0.8 \) (O) 0.8 (O.2, \( 0.9,3.2,4.1 \) (o) \( 0.9,2.5,7.7 \)

3. Identifica la moda del siguiente conjunto de datos estadísticos. \( 8,14,2,7,11,10,10,7,3,7,1,7 \) () 10,14 ( 14 ( 7 (o) 10

Assume that a sample is used to estimate a population mean \( \mu \). Find the \( 99.9 \% \) confidence interval for a sample of size 75 with a mean of 44.5 and a standard deviation of 20.7 . Enter your answer as an open- interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). \( 99.9 \% \) C.I. \( = \) Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

Identifica la moda del siguiente conjunto de datos estadísticos. 1.8, \( 9.4,7.3,4.6,10.5,3.7,4.9,8.1,4.6 \), \( 5.1,7.6,4.4 \) () 4.6 (a) 7.3 (? 9.4 ( 1.8

Identifica la moda del siguiente conjunto de datos estadísticos. \( 3,1,3,1,6,6,3,2,6,4,5,5 \) (?) \( 1,5,6 \) ( 3,6 () 1,6

Problem 8 ( 10 points). Suppose that \( 60 \% \) of all Miami-Dade residents prefer Coke over Pepsi in a taste test. You randomly sample (poll) \( N=175 \) Miami-Dade residents and determine the number (X) who prefer Coke over Pepsi. Compute the probability that \( 55 \% \) or more of the polled individuals prefer Coke.

From the following scenarios, choose which will likely have no correlation. Answer \[ \begin{array}{l}\text { The weight of a dog and the number of commands known } \\ \text { The number of books an adult reads each month and the length of their hair } \\ \text { The weight of a dog and their daily food intake }\end{array} \] The child and their height