Answer:
Step-by-step explanation:
Given that random sample of 25 values is drawn from a mound-shaped and symmetrical distribution. The sample mean is 10 and the sample standard deviation is 2.
95 % CI for mean 9.1744 to 10.8256
Since p >0.05 accept null hypothesis.
a) Yes because std dev sigma not known. df = 24
b)
H0: x bar = 9.5
Ha: x bar not equals 9.5
c) t-statistic 1.250
d) P = 0.2234
e) We fail to reject null hypothesis
f) There is no statistical evidence at 5% level to fail to reject H0.
The cruising speed of the airplane is equal to 200 m/s.
<u>Given the following data:</u>
- Time =
To calculate the cruising speed of the airplane:
<h3>What is speed?</h3>
Speed can be defined as the distance covered by a physical object per unit of time. Thus, speed can be measured as meter per seconds.
Mathematically, speed is given by this formula;
<u>Conversion:</u>
Distance = 1 kilometer = 1000 meter
Time =
Substituting the given parameters into the formula, we have;
Speed = 200 m/s.
Read more on speed here: brainly.com/question/10545161
0.05x=20
-------- -------
0.05 0.05
×=400