- Given a normal distribution with a μ = 40 and o u 4.6 find the z-score that corresponds to each x value below. Round all answers to two decimal places. a.) Find the z-score corresponding to x = 37. b.) Find the z-score corresponding to x = 42.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
### Understanding Z-Scores in a Normal Distribution

A **normal distribution** is a continuous probability distribution for a random variable, where the data tends to cluster around a mean (average). The shape of the distribution is symmetric and bell-shaped.

When dealing with normal distributions, a **z-score** helps us understand how far a particular value (or "x value") is from the mean of the distribution. The formula for calculating the z-score is:

\[ z = \frac{{x - \mu}}{{\sigma}} \]

where:
- \( x \) is the value in question
- \( \mu \) is the mean of the distribution
- \( \sigma \) is the standard deviation of the distribution

Given a normal distribution with a mean (\( \mu \)) of 40 and a standard deviation (\( \sigma \)) of 4.6, find the z-score for each x value provided. Round all answers to two decimal places.

**Problem Set:**

**a.) Find the z-score corresponding to \( x = 37 \).**

\[ \boxed{} \]

**b.) Find the z-score corresponding to \( x = 42 \).**

\[ \boxed{} \]

In these problems:
- You need to substitute the given values into the z-score formula.
- For example, for part (a), substitute \( x = 37 \), \( \mu = 40 \), and \( \sigma = 4.6 \) to find the z-score.
- Compute the value and round to two decimal places.

Ensure you perform the calculations carefully and round off your final answers properly as instructed.
Transcribed Image Text:### Understanding Z-Scores in a Normal Distribution A **normal distribution** is a continuous probability distribution for a random variable, where the data tends to cluster around a mean (average). The shape of the distribution is symmetric and bell-shaped. When dealing with normal distributions, a **z-score** helps us understand how far a particular value (or "x value") is from the mean of the distribution. The formula for calculating the z-score is: \[ z = \frac{{x - \mu}}{{\sigma}} \] where: - \( x \) is the value in question - \( \mu \) is the mean of the distribution - \( \sigma \) is the standard deviation of the distribution Given a normal distribution with a mean (\( \mu \)) of 40 and a standard deviation (\( \sigma \)) of 4.6, find the z-score for each x value provided. Round all answers to two decimal places. **Problem Set:** **a.) Find the z-score corresponding to \( x = 37 \).** \[ \boxed{} \] **b.) Find the z-score corresponding to \( x = 42 \).** \[ \boxed{} \] In these problems: - You need to substitute the given values into the z-score formula. - For example, for part (a), substitute \( x = 37 \), \( \mu = 40 \), and \( \sigma = 4.6 \) to find the z-score. - Compute the value and round to two decimal places. Ensure you perform the calculations carefully and round off your final answers properly as instructed.
Expert Solution
steps

Step by step

Solved in 3 steps

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman