Answer:
0.5085
Step-by-step explanation:
Given that an office has 30 computers. Seventeen of the 30 are Macintosh, and the remaining thirteen are windows.
When two computers are randomly selected without replacement
no of ways of selection =
No of ways of selecting one window and one Mac =
Prob that the sample contains exactly one windows machine and exactly one Macintosh=
Answer:
a)
We can use the following excel code: "=2*(1-T.DIST(2.48,9,TRUE))"
b)
We can use the following excel code: "=2*(1-T.DIST(3.95,9,TRUE))"
c)
We can use the following excel code: "=2*(1-T.DIST(2.69,9,TRUE))"
d)
We can use the following excel code: "=2*(1-T.DIST(1.88,9,TRUE))"
Step-by-step explanation:
For this case we are testing the following system of hypothesis:
Null hypothesis:
Alternative hypothesis:
The sample size is n=10, so then the degrees of freedom are given by:
In order to calculate the p value we can use the fact that we are conducting a bilateral test so then the p value is given by:
Where represent the calculated or observed statistic.
a) t0= 2.48
We can use the following excel code: "=2*(1-T.DIST(2.48,9,TRUE))"
b) t0= -3.95
We can use the following excel code: "=2*(1-T.DIST(3.95,9,TRUE))"
c) t0=2.69
We can use the following excel code: "=2*(1-T.DIST(2.69,9,TRUE))"
d) t0=1.88
We can use the following excel code: "=2*(1-T.DIST(1.88,9,TRUE))"