Answer:
a
The null hypothesis is
The alternative hypothesis is
b

c
The decision rule is
Reject the null hypothesis
d
The conclusion is
There is no sufficient evidence to conclude that the variance of the immune response is equal to 1.9.
Step-by-step explanation:
From the question we are are told that
The variance is
The sample size is n = 30
The sample variance is
The level of significance is
The null hypothesis is
The alternative hypothesis is
Generally the test statistics is mathematically represented as

=> 
=> 
Generally from the degree of freedom is mathematically represented as

=> 
=> 
Generally from the chi distribution table the critical value of
at a degree of freedom of
is

=> 
Gnerally from the values obtained we see that
hence
The decision rule is
Reject the null hypothesis
The conclusion is
There is no sufficient evidence to conclude that the variance of the immune response is equal to 1.9.
Answer:
0
Step-by-step explanation:
m= y2-y1/x2-x1
=0-0/-3-5
=0/-8
=0
We know that
The formula for combinations is<span>
C=n!/[(n-r)!*r!]
where
n is the total number of objects you choose from
r is the number that you choose to arrange
in this problem
n=4 </span>aluminum side panels measures
r=2 aluminum side panels measures
<span>
C=4!/[(4-2)!*2!]----->
C=4!/[2!*2!]---> (4*3*2!)/(2!*2*1)
C</span>=6
1) 8 ft x 10 ft
2) 8 ft x 12 ft
3)8 ft x 15 ft
4) 10 ft x 12 ft
5) 10ft x 15 ft
6) 12 ft x 15 ft
additionally, we have each measure with itself
7) 8 ft x 8 ft
8) 10 ft x 10 ft
9) 12 ft x 12 ft
10) 15 ftx 15 ft
the answer is
10 possible sets