Answered: A cognitive scientist wants to test…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

A cognitive scientist wants to test whether there is any difference in puzzle-solving abilities
between crows and sparrows. Independent samples of eight crows and fourteen sparrows were
chosen at random. The crows took a mean of 34 minutes to solve a certain puzzle, with a
standard deviation of 4.5 minutes. The sparrows took a mean of 40 minutes to solve the same
puzzle, with a standard deviation of 5.9 minutes.
Can we conclude, at the 0.05 level of significance, that ?1, the mean puzzle-solving times for
crows, is less than ?2, the mean puzzle-solving times for sparrows?
Perform a one-tailed test. Then complete the parts below. Carry your intermediate
computations to three or more decimal places.

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