The answer to this would be
The correct answer is letter C.
The reason is because there are 12 cake donuts out of the 36 total. This is a simple ratio of 1 to 3. This means one out of every 3 people would get a cake donut. If there are 12 people, this is 4 groups of 3, so one person from each group of 3 is 4 people.
2d hour- 10 puppies
3rd hour- 8 puppies
4th hour- 6 puppies
5th hour- 4 puppies
6th hour- 2 puppies
Answer:
Step-by-step explanation:
Base on the scenario been described in the question, we can use the following method to solve the given problem
Test the claim at 5% level of significance.
0: − ≤ 0
: − > 0
Since the population standard deviations are known we can use z-distribution.
Test statistic is
=
√
1
2
1
+
2
2
2
=
4.5 − 4.1
√
1.58112
100 +
1
2
100
= 2.14.
Critical value for 5% level of significance:
zcrit = 1.645.
We reject the null hypothesis at 5% level of significance because the test statistic = 2.14 is bigger than
critical value zcrit= 1.645. There is evidence to conclude that students in the California state university
system take on average longer to graduate, than students enrolled in private universities.
