Answered: From a random sample of 25 students in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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From a random sample of 25 students in a biology class that uses online distance learning technique, the sample mean final exam score was found to be 72 and the sample standard deviation was 5. Answer the following questions.
a) Test at 5% significance level that population mean score for the class is greater than or equal to 75 against it is less than 75. Write down all the necessary components for a hypothesis test (= hypotheses, decision rules, decision and its meaning). Draw a figure explaining the test.

b) Suppose that the true population mean for the class with group-learning techniques is 71. Given the setting from part (a), calculate Type II error. Draw the figure.

İstatistik

isim: istatistik, istatistik bilimi

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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