Psychological Statistics - Testing Hypothesis about Means - T-testPlease recheck & answer effect size 3. The mean Verbal SAT was 515 for 238 college students who took this test. Thenorm of the test revealed a mean of 500 with a standard deviation of 100. Do youthink this group performed better that the norm group? Test at alpha .05 using anon-directional hypothesis (Howell, 2008) If proved significant, compute of theeffect size.

Given:- Sample size, n= 238Population mean μ = 515Sample mean x¯ = 500Sample standard deviation S=…

Answered: The mean Verbal SAT was 515 for 238…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

See similar textbooks

Related questions

Question

Psychological Statistics - Testing Hypothesis about Means - T-test

Please recheck & answer effect size

3. The mean Verbal SAT was 515 for 238 college students who took this test. The
norm of the test revealed a mean of 500 with a standard deviation of 100. Do you
think this group performed better that the norm group? Test at alpha .05 using a
non-directional hypothesis (Howell, 2008) If proved significant, compute of the
effect size.

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 + ...

Expert Solution