Answer:
C
Step-by-step explanation:
rotate it 90 clock about vertex = c
Answer: 11.667
Step-by-step explanation:
The formula to find the test statistic for chi-square test is given by :-

Given : Claim : 

Then , the standardized test statistic will be :-

Hence, the standardized test statistic 
Answer:
he can shoot 12 shots in 1minute
Step-by-step explanation:
3minutes = 36 shots
1 minute= 36 divided by 3 which is equal to 12
Answer:
280 students
111 non students
Step-by-step explanation:
number of students (S)
number of non students (N)
S+N=391 S=391-N
4S+6N=1786
substitute S
4(391-N)+6N=1786
1564-4N+6N=1786
subtract 1564 from each side
2N=222
N=111
S=391-111=280
25 less than or equal too 300,not really enough information