Statistics Questions & Answers

Construct a \( 95 \% \) confidence interval for \( \mu \) if the sample size \( n=34 \), the sample mean \( \bar{x}=18.6 \), and the sample standard deviation \( s=4.2 \). Enter the confidence interval using no spaces between, and use a lowercase \( m \) for the mean of the population and round to 3 decimals. For example, \( 112.380<m<118.370 \)

A political campaign is interested in whether a geographic difference existed in support for raising the minimum wage in a certain state. Polls were conducted in the two largest cities in the state about raising the minimum wage. In city 1 , a poll of 800 randomly selected voters found that 316 supported raising the minimum wage. In city 2, a poll of 1000 randomly selected voters found that 369 supported raising the minimum wage. What type of hypothesis test should be performed? Select \( \hat{p}_{1}= \) Ex: 0.123 \( \hat{p}= \) Ex: 0.123 Test statistic \( = \) Ex: 0.12 \( p \)-value \( = \) Ex: 0.123 Does sufficient evidence exist to support the claim that the level of support differs between the two cities at the \( \alpha=0.05 \) significance level? Select \( v \)

A political campaign is interested in whether a geographic difference existed in support for raising the minimum wage in a certain state. Polls were conducted in the two largest cities in the state about raising the minimum wage. In city 1 , a poll of 800 randomly selected voters found that 541 supported raising the minimum wage. In city 2 , a poll of 1000 randomly selected voters found that 635 supported raising the minimum wage. What type of hypothesis test should be performed? Select \( \hat{p}_{1}= \) Ex: 0.123 \( \hat{p}=\hat{p}_{2}= \) Ex: 0.123 Test statistic \( =123 \) \( p \)-value \( = \) Ex: 0.12 Does sufficient evidence exist to support the claim that the level of support differs between the two cities at the \( \alpha=0.01 \) significance level? Select \( v \)

6) In a race, the three fastest times were 12.13 seconds, 11.23 seconds and 12.31 secor Which one of the following orders of first, second and third is correct? \( 11.23,12.31,12.13 \) \( 12.31,12.13,11.23 \) \( 12.13,11.23,12.31 \) \( 11.23,12.13,12.31 \)

Find the error in constructing a \( 95 \% \) confidence interval for \( \mu \) if the sample size \( n=15 \), the sample mean \( \bar{x}=18.6 \), and the sample standard deviation \( s=4.2 \). Enter a number to 3 decimal places.

A political campaign is interested in whether a geographic difference existed in support for raising the minimum wage in a certain state. Polls were conducted in the two largest cities in the state about raising the minimum wage. In city 1 , a poll of 800 randomly selected voters found that 584 supported raising the minimum wage. In city 2 , a poll of 1000 randomly selected voters found that 671 supported raising the minimum wage. What type of hypothesis test should be performed? Select \( \hat{p}_{1}= \) Ex: 0.123 . \( \hat{p}= \) Ex: 0.123 Test statistic \( =0.123 \) p-value \( = \) Ex: 0.123 Does sufficient evidence exist to support the claim that the level of support differs between the two cities at the \( \alpha=0.01 \) significance level? Select \( v \)

60. A un grupo de mujeres se le preguntó acerca de su masa corporal. Sus respuestas so resumen en el histograma de la figura adjunta, donde los intervalos son de la torma \( [\mathrm{a}, \mathrm{b} \) y el utlimo de la forma \( [\mathrm{c}, \mathrm{d}] \). Segùn la informacón del grálico es verdadero que.

Los tubos de magnetrón se producen en una línea de ensamble automatizada. Periódicament se utiliza un plan de muestreo para evaluar la exactitud en la longitud de los tubos; sin embarg dicha medida está sujeta a incertidumbre. Se considera que la probabilidad de que un tub elegido al azar cumpla con las especificaciones de longitud es \( 99 \% \). Se utiliza un plan d muestreo en el cual se mide la longitud de cinco tubos elegidos aleatoriamente [videos guía

Does sufficient evidence exist to support the claim that the voltage of the batt \( \epsilon \) by the two manufacturers is different at the \( \alpha=0.1 \) significance level? No

Simpangan rata - rata data \( 2,3,4 \) \( 5,5,7,8,8,9,9 \) adalah ....