True, as sample size n becomes large, sample mean of a sample from a population is the same as the population mean.
<h3 /><h3>What is Sample mean?</h3>
The statistic known as the sample mean is created by arithmetically averaging the values of a variable in a sample. The sample mean is an estimator of the expected value if the sample is taken from probability distributions with a common expected value.
The sample mean of a population sample approaches the population mean as sample size n increases.
A sample that is more representative of the population and that has a bigger size is also a better sample to employ for statistical analysis. Even if the difference between the experiment and control group is lower as the sample size increases, it is simpler to spot the difference.
In other words, The sampling distribution's mean equals the population mean when there are "infinite" numbers of subsequent random samples taken at random. Each sampling distribution's variability diminishes as sample size rises, making the distributions more and more leptokurtic.
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Answer:
The value of the damping coefficient γ is (6/19)√29, which is approximately 1.70058.
Step-by-step explanation:
Given that a certain vibrating system satisfies the equation
u'' + γu' + u = 0
We wish to find the value of the damping coefficient γ for which the quasi period of the damped motion is 90% greater than the period of the corresponding undamped motion.
The period of the undamped motion T is 2π
The quasi period T_d is (4π)/√(4 - γ²)
Since the quasi period is 90% greater than the period of the undamped motion, we have
T_d = 1.9T
So that we can finally obtain
γ as 1.70058.
THE STEP-BY-STEP WORKING IS SHOWN IN THE ATTACHMENTS.
Answer:
C
Step-by-step explanation:
Answer:
A. (175÷72)+9
Step-by-step explanation:
Answer: 20 feet
Step-by-step explanation:
Hi, since the situation forms a right triangle we have to apply the Pythagorean Theorem:
c^2 = a^2 + b^2
Where c is the hypotenuse of the triangle (in this case the diagonal distance covered by the stairs) and a (horizontal distance) and b (vertical distance) are the other sides.
Replacing with the values given:
25^2 = 15^2 + b^2
625 = 225 + b^2
625-225 = b^2
400= b^2
√400 =b
b =20 feet
Feel free to ask for more if needed or if you did not understand something.