Is this all the problem wants ?
I assumed that 3 households are sampled.
Now, is the number in each of these households equal to 1, 3 and 8 people?
Next, the question says, samples of n=2 are randomly selected (with replacement) from these 3.
So are sample space is
11
13
31
33
18
81
38
88
83
88
This is done 9 times.
Is that how you understand the problem?
When they select the household with only 1 person, the variance is 0
When they select the household with 8 people, they variance will be from a discrete uniform distribution
Similarly for household with 3 individuals.
Answer:
75 seconds to run 180 meters
Step-by-step explanation:
(180m) / (2.4m/s) = 75 seconds
75 seconds to run 180 meters, but if we take into consideration the initial 39 seconds, then the total time it took to run (75s + 39s) was 114 seconds.
The question didn't explicitly ask the total time it took, but the time it took to run 180 meters.
Answer:
Distance between Exeter and the point where flat tire occurred was 1.875 miles.
Step-by-step explanation:
Let the distance of Exeter and the point where bike developed the flat tire was = x miles
Then time taken to reach that point with speed 15 mi per hour = 
= 
hours
Devon comes back with a speed of 3 miles per hour then time taken to come back = 
hours
Total time for the entire episode = 48 minutes or 
hours
Therefore, 
x = 
x = 
miles
x = 1.875 miles
Therefore, distance between Exeter and the point where flat tire occurred was 1.875 miles.
