A random sample of displaystyle{n}_{{1}}={16} communities in western Kansas gave the following information for

A random sample of ${\displaystyle n_1=16}$ communities in western Kansas gave the following information for people under 25 years of age.
${\displaystyle X_1:}$ Rate of hay fever per 1000 population for people under 25
$\begin{array}{|cccccccc|}\hline 97& 91& 121& 129& 94& 123& 112& 93\\ 125& 95& 125& 117& 97& 122& 127& 88\\ \hline\end{array}$
A random sample of ${\displaystyle n_2=14}$ regions in western Kansas gave the following information for people over 50 years old.
${\displaystyle X_2:}$ Rate of hay fever per 1000 population for people over 50
$\begin{array}{|ccccccc|}\hline 94& 109& 99& 95& 113& 88& 110\\ 79& 115& 100& 89& 114& 85& 96\\ \hline\end{array}$
(i) Use a calculator to calculate ${\displaystyle {\bar{x}}_1,s_1,{\bar{x}}_2,\text{and}{s}_2.}$ (Round your answers to two decimal places.)
(ii) Assume that the hay fever rate in each age group has an approximately normal distribution. Do the data indicate that the age group over 50 has a lower rate of hay fever? Use ${\displaystyle \alpha =0.05.}$
(a) What is the level of significance?
State the null and alternate hypotheses.
${\displaystyle H_0:{\mu }_1={\mu }_2,H_1:{\mu }_1<{\mu }_2}$
${\displaystyle H_0:{\mu }_1={\mu }_2,H_1:{\mu }_1>{\mu }_2}$
${\displaystyle H_0:{\mu }_1={\mu }_2,H_1:{\mu }_1\ne {\mu }_2}$
${\displaystyle H_0:{\mu }_1>{\mu }_2,H_1:{\mu }_1={\mu }_{12}}$
(b) What sampling distribution will you use? What assumptions are you making?
The standard normal. We assume that both population distributions are approximately normal with known standard deviations.
The Student's t. We assume that both population distributions are approximately normal with unknown standard deviations,
The standard normal. We assume that both population distributions are approximately normal with unknown standard deviations,
The Student's t. We assume that both population distributions are approximately normal with known standard deviations,
What is the value of the sample test statistic? (Test the difference ${\displaystyle {\mu }_1-{\mu }_2}$. Round your answer to three decimalplaces.)

What is the value of the sample test statistic? (Test the difference ${\displaystyle {\mu }_1-{\mu }_2}$. Round your answer to three decimal places.)
(c) Find (or estimate) the P-value.
P-value ${\displaystyle >0.250}$
${\displaystyle 0.125<P-\text{value}<0,250}$
${\displaystyle 0,050<P-\text{value}<0,125}$
${\displaystyle 0,025<P-\text{value}<0,050}$
${\displaystyle 0,005<P-\text{value}<0,025}$
P-value ${\displaystyle <0.005}$
Sketch the sampling distribution and show the area corresponding to the P-value.
P.vaiue Pevgiue
P-value f P-value