Step-by-step explanation:
First step:
Distance = 300km
Speed = 60km/hr
We know,
Using Speed = Distance ÷ Time
Time = Distance ÷ Speed
we have Total Time = 300÷60
Total Time = 5hr
Again,
Distance = 200km. (Time = 5hr,
Speed =? Distance = 200)
Speed = Distance÷ Time
= 200÷5
= 40km/hr
Answer:

And replacing we got:

And we can find the bias with this formula:

And replacing we got:

Step-by-step explanation:
For this problem we know that the random variable of interest follows this distribution:

And we have the following random sample given:
39.2, 45.7, 27.4, 25.9, 25.1, 46.3, 42.9, 49.0, 40.6, 47.0
And we can calculate the sample mean with the following formula:

And replacing we got:

And we can find the bias with this formula:

And replacing we got:

Answer
the answer is C
Step-by-step explanation:
nothing