2. the thermal inertia properties of concrete used as a building material were studied. five samples of the material were tested in a structure, and the average interior temperatures (c) were reported as follows: 23.01, 22.22, 22.04, 22.62, and 22.59. assume that the interior temperature is normally distributed and the significance level,  is 0.05. a. test whether the average interior temperature equals 22.5 or not by following the steps of hypothesis testing, i. e., state the null and alternative hypotheses, write and calculate the appropriate test statistic, compare to the critical value, write your conclusion. b. construct a 95% confidence interval for the population mean . can you use the resulting confidence interval to answer part (a)? explain.

we need the options

step-by-step explanation:

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation:

did you get the answer yet?

step-by-step explanation:

unless you made a typo, the answers are both a and c.

step-by-step explanation:

1.5/3 is .5 whereas 3/9 is .3333333 not proportional

22/33 is .66666 and 4/6 is also .66666 proportional

2/4 is .5 whereas 142/213 is .66666 not proportional

14/7 is 2 and 7/3.5 is also 2 proportional

you could've also checked it by doing this simple division:

if the larger fraction divides with the smaller fraction to equal 1, it is proportional. so let me show you what i mean:

when i divide 22/33 by 4/6 i get 1, so we know it is proportional, and it is the same with 14/7 and 7/3.5. now if i divide 3/9 by 1.5/3 i get .66666 so therefore we know it is not proportional.

there are many ways to do this so i wanted to show you some possible ways.