Using appendix c-1 or appendix c-2 find the p-value for each test statistic. (round your answers to 4 decimal places.) test statistic p-value
(a) right-tailed test z = +2.82
(b) left-tailed test z = –1.28
(c) two-tailed test z = –1.55

a)

b)

c)

Step-by-step explanation:

It's important to refresh the p value method or p value approach . "This methos is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

Part a

A right tailed test (usually called an upper test) is where the alternative hypothesis statement contains a greater than (>) symbol

The p value on this case is given by:

We can calculate the probability in excel like this:

"=1-NORM.DIST(2.82,0,1,TRUE)"

Part b

A left tailed test (usually called an lower test) is where the alternative hypothesis statement contains a greater than (<) symbol

The p value on this case is given by:

We can calculate the probability in excel like this:

"=NORM.DIST(-1.28,0,1,TRUE)"

Part c

A two tailed test (usually called an bilateral test) is where the alternative hypothesis statement contains a not equal symbol

The p value on this case is given by:

We can calculate the probability in excel like this:

"=2*NORM.DIST(-1.55,0,1,TRUE)"

this doesn't make sense lol