Find the minimum sample size n needed to estimate u for the given values of c, o, and E. c= 0.98, o = 9.6, and E= 2

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
Topic Video
Question
**Determining Sample Size for Estimating Population Mean (μ)**

To find the minimum sample size \( n \) required to estimate the population mean \( \mu \) for the given values of confidence level ( \( c \) ), population standard deviation ( \( \sigma \) ), and margin of error ( \( E \) ), use the following information:

**Given:**
- Confidence level, \( c = 0.98 \)
- Population standard deviation, \( \sigma = 9.6 \)
- Margin of error, \( E = 2 \)

**Instruction:**
Assume that a preliminary sample has at least 30 members.

**Formula:**
\( n = \left( \frac{ z \sigma }{ E } \right)^2 \)

To find the \( z \)-score corresponding to the confidence level, and then use it to compute the sample size:

1. **Identify \( z \)-score:**
   For a \( 98\% \) confidence level, the corresponding \( z \)-score can be found using statistical tables or computational tools.

2. **Calculate sample size (\( n \)):**
   Substitute the given values into the formula and round up to the nearest whole number.

**Note:** Round up to the nearest whole number to ensure the sample size is adequate for the desired level of confidence.

\[
n = \left( \frac{ z \sigma }{ E } \right)^2
\]

(Here, the actual calculation steps and the \( z \)-score would typically be provided for instructional purposes.)

**Result:**
\[ n = \text{(Insert the computed value here)} \]

This calculation helps ensure that the sample size is sufficient to estimate the population mean with the specified level of confidence and margin of error.
Transcribed Image Text:**Determining Sample Size for Estimating Population Mean (μ)** To find the minimum sample size \( n \) required to estimate the population mean \( \mu \) for the given values of confidence level ( \( c \) ), population standard deviation ( \( \sigma \) ), and margin of error ( \( E \) ), use the following information: **Given:** - Confidence level, \( c = 0.98 \) - Population standard deviation, \( \sigma = 9.6 \) - Margin of error, \( E = 2 \) **Instruction:** Assume that a preliminary sample has at least 30 members. **Formula:** \( n = \left( \frac{ z \sigma }{ E } \right)^2 \) To find the \( z \)-score corresponding to the confidence level, and then use it to compute the sample size: 1. **Identify \( z \)-score:** For a \( 98\% \) confidence level, the corresponding \( z \)-score can be found using statistical tables or computational tools. 2. **Calculate sample size (\( n \)):** Substitute the given values into the formula and round up to the nearest whole number. **Note:** Round up to the nearest whole number to ensure the sample size is adequate for the desired level of confidence. \[ n = \left( \frac{ z \sigma }{ E } \right)^2 \] (Here, the actual calculation steps and the \( z \)-score would typically be provided for instructional purposes.) **Result:** \[ n = \text{(Insert the computed value here)} \] This calculation helps ensure that the sample size is sufficient to estimate the population mean with the specified level of confidence and margin of error.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Hypothesis Tests and Confidence Intervals for Means
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar 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