Why the correct answer is D? The distribution of the time it takes for different people to solve a certain crossword puzzle is skewed to the right,with a mean of 30 minutes and a standard deviation of 15 minutes. The distribution of z-scores for those times is(a) Normally distributed, with mean 30 and standard deviation 15.(b) skewed to the right, with mean 30 and standard deviation 15.(c) Normally distributed, with mean 0 and standard deviation 1.(d) skewed to the right, with mean 0 and standard deviation 1.(e) skewed to the right, but the mean and standard deviation cannot be determined without more information. The distribution of the time it takes for different people to solve a certain crossword puzzle is skewed to the right,with a mean of 30 minutes and a standard deviation of 15 minutes. The distribution of z-scores for those times is(a) Normally distributed, with mean 30 and standard deviation 15.(b) skewed to the right, with mean 30 and standard deviation 15.(c) Normally distributed, with mean 0 and standard deviation 1.(d) skewed to the right, with mean 0 and standard deviation 1.(e) skewed to the right, but the mean and standard deviation cannot be determined without more information.

Answered: Why the correct answer is D? The…

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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Why the correct answer is D?

The distribution of the time it takes for different people to solve a certain crossword puzzle is skewed to the right,
with a mean of 30 minutes and a standard deviation of 15 minutes. The distribution of z-scores for those times is
(a) Normally distributed, with mean 30 and standard deviation 15.
(b) skewed to the right, with mean 30 and standard deviation 15.
(c) Normally distributed, with mean 0 and standard deviation 1.
(d) skewed to the right, with mean 0 and standard deviation 1.
(e) skewed to the right, but the mean and standard deviation cannot be determined without more information.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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