Answer:
D
Step-by-step explanation:
:)
Answer:
i am having trouble with that too
Step-by-step explanation:
Answer:
Smallest rate for the train is 50 mph and largest is 60 mph.
For the bus it is 25 and 30 mph.
Step-by-step explanation:
If the speed of the train is 2x then speed of the bus is x mph, and the train travels twice as far as the bus in a given time.
Distance = speed * time
For the largest rate:
d = 2x * 0.5 for the train
x = d
0.5d = x for the bus
d - 0.5d = 15
0.5d = 15
d = 30
So the rate for the train = 30 / 0.5 = 60 mph.
In a similar fashion we can show that the smallest rate for the train is
25/ 0.5 = 50 mph.
Answer:
D.
Step-by-step explanation:
the slope formula - y = mx + b
m = slope
b = y intercept
Using the t-distribution, the t-statistic for the two-sided test would be of t = 0.7.
<h3>What is the test statistic for a t-distribution hypotheses test?</h3>
The test statistic is given by:
The parameters are:
is the sample mean.
is the expected value.
- s is the standard deviation of the sample.
The values of the parameters are given as follows:
.
The sample mean is:
Hence the test statistic is:
t = 0.7.
More can be learned about the t-distribution at brainly.com/question/16194574
<h3>#SPJ1</h3>
