Answered: Mistakes in a Song A random sample of…

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

Mistakes in a Song A random sample of six music students played a short song, and the number of mistakes in music each student made was recorded. After they practiced the song 5 times, the number of mistakes each student made was recorded. The data are shown. At a=.01, can it be concluded that there was a decrease in the mean number of mistakes? Assume that all variables are normally or approximately normally distributed. Let u1 be the mean before practicing and ud=u1-u2
Student A B C D E F
Before 8, 9, 14, 4, 7, 2
After 7, 5, 11, 3, 2, 3

1. State the hypotheses and identify the claim

H0:

H1:

Is this test one tailed or two tailed?

2. Find the critical value(s) (with n=6 first calculate the correct range of freedom)

critical value(s) =

3. Compute the test value=

4. Do not reject or Reject the null hypothesis

5. Is there enough evidence to support the claim

Please answer all parts of each question 1-5 and be sure the degree of freedom calculation is correct before calculating 2 and 3. Thanks in advance for the help.

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