Answered: A psychologist claims that the mean age…

Name: A psychologist claims that the mean age at which children start walkin
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: A psychologist claims that the mean age at which children start walking is 12.5 months. Carol wanted to check if the claim is true. She took a random sample of 18 children and found that the mean age at which these children started walking was 12.9 m

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

Topic Video

Question

A psychologist claims that the mean age at which children start walking is 12.5 months. Carol wanted to check if the claim is true. She took a random sample of 18 children and found that the mean age at which these children started walking was 12.9 months with a standard deviation of 0.8 months. It was known that the ages at which all children start walking are approximately normally distributed. Test Carol's claiming using a 2% level of significance.

With this problem, I am specifically confused on the very first part - of writing this statement symbolically, and in knowing how to formulate H0 and H1.

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.

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 5 images

SEE SOLUTION Check out a sample Q&A here

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