Answer:
Option B is correct.
Use the difference in sample means (10 and 8) in a hypothesis test for a difference in two population means.
Step-by-step Explanation:
The clear, complete table For this question is presented in the attached image to this solution.
It should be noted that For this question, the running coach wants to test if participating in weekly running clubs significantly improves the time to run a mile.
In the data setup, the mean time to run a mile in January for those that participate in weekly running clubs and those that do not was provided.
The mean time to run a mile in June too is provided for those that participate in weekly running clubs and those that do not.
Then the difference in the mean time to run a mile in January and June for the two classes (those that participate in weekly running clubs and those that do not) is also provided.
Since, the aim of the running coach is to test if participating in weekly running clubs significantly improves the time to run a mile, so, it is logical that it is the improvements in running times for the two groups that should be compared.
Hence, we should use the difference in sample means (10 and 8) in a hypothesis test for a difference in two population means.
Hope this Helps!!!
Answer:
Step-by-step explanation:
<u>Probabilities</u>
When we choose from two different sets to form a new set of n elements, we use the so-called hypergeometric distribution. We'll use an easier and more simple approach by the use of logic.
We have 6 republicans and 4 democrats applying for two positions. Let's call R to a republican member and D to a democrat member. There are three possibilities to choose two people from the two sets: DD, DR, RR. Both republicans, both democrats and one of each. We are asked to compute the probability of both being from the same party, i.e. the probability is
Let's compute P(DD). Both democrats come from the 4 members available and it can be done in different ways.
For P(RR) we proceed in a similar way to get different ways.
The total ways to select both from the same party is
The selection can be done from the whole set of candidates in different ways, so
Question:
Taylor and his Dad plan to build a deck on the back of their house. First, they make a scale drawing of the deck. The scale is 1.25 inches = 2 feet.
This is the drawing: the scale drawing deck is 17 by 11
Using this drawing, enter the length, in feet, Taylor must use for the deck?Answer:
The length, Taylor must use for the deck is 27 .2 feet
Step-by-step explanation:
Given:
The dimensions of the deck = 17 by 11
Scale = 1.25 inches = 2 feet.
To Find:
The length, in feet, Taylor must use for the deck
Solution:
According to the scale
1.25 inches = 2 feet
Then
1 inch =
The length of the deck = 17 inches
So 17 inches =
17 inches = 27.2 feet
Nothing further can be done if you evaluate it it just satays the same but it's like :
(-2) , 5