The average time to run the 5K fun run is 24 minutes and the standard deviation is 2.7 minutes. 16 runners are randomly selected to run the 5K fun run. Round all answers to 4 decimal places where possible and assume a normal distribution. a. What is the distribution of X? X- N( b. What is the distribution of a? - N( c. What is the distribution of 2? - N hat thi Fupnere time ill be between
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
Part a, b and c please
![The average time to run the 5K fun run is 24 minutes and the standard deviation is 2.7 minutes. 16 runners are
randomly selected to run the 5K fun run. Round all answers to 4 decimal places where possible and assume a
normal distribution.
a. What is the distribution of X? X - N(
b. What is the distribution of ? - N(
c. What is the distribution of ? a - N(
С.
d. If one randomly selected runner is timed, find the probability that this runner's time will be between
23.1875 and 23.9875 minutes.
e. For the 16 runners, find the probability that their average time is between 23.1875 and 23.9875
minutes.
f. Find the probability that the randomly selected 16 person team will have a total time less than 372.8.
For part e) and f), is the assumption of normal necessary? O No Yes
g.
h. The top 10% of all 16 person team relay races will compete in the championship round. These are the
10% lowest times. What is the longest total time that a relay team can have and still make it to the
championship round?
minutes
Hint:
Some Helpful Videos:
• Finding the Sampling Distribution [+]
• Finding a Probability Using the Central Limit Theorem
Finding Value Given a Probability Using the Central Limit Theorem 2 [+]
• The Central Limit Theorem For Sums E [+]
[+]
Hint
RasmusseRE
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