1. People's opinion were asked about the president's performance. Opinions were polled before he wasinaugurated to office and after two years in office. Is there a change in opinions.Ind. BeforeInauguration yearsAfter 219070290753946049260806586607776072509.706510834011857012 8913 | 706545a. Compute the standard deviationb. Compute for the standard deviation of the error of the difference.c. Compute the t ratiod. Test the significance of t.e. Conclusion.#2. Anti drug scale attitude was determined before and after one -week drug seminar to itsparticipants. On the basis of the data, is it valid to say that the seminar effected on attitude change?a. Cormpute the standard deviationb. Compute for the standard deviation of the error of the difference.G. Compute thet ratiod, Test the significance of t.e. Conclusion.BeforeAfter190952807770804757557076662727083882897379106575115270127880138283149092157585

Since you have posted multiple questions, we will answer the first question for you. If you want any…

Answered: 1. People's opinion were asked about…

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

Similar questions

1. What does the standard deviation measure?
What is the best approximation of the standard deviation ofthe measures -4, -3.0, 8, and 9?
In a medical examination, 300 people undergo a height measurement and was found out that the average height of all are 150cm. If the standard deviation is 19, find the number of people that fall under the given conditions: With height less than 132cm. With height from 140 cm to 180 cm With height taller than 200 cm With height from 160cm to 195 cm With height from 150 cm to 200cm Determine the range of the height that includes the central 60% 45% of the people who undergo the medical examinations are qualified to be part of the varsity. What is the limit height to be part of the varsity?
The table below shows some data fromn a known international clothing company. Each row in the table shows sales for a year (in million) and the amount spent on advertising that year (in million). In this case, sales is what we want to predict using the advertising budget. Find the following. Given that: Mean of Advertising =15 and standard deviation = 5 Mean of Sales= 45 and standard deviation = 10 Advertising (Million) Sales (Million) 19 54 10 28 12 43 17 47 8 32 15 50 22 65 1. Find the correlation coefficient (r). Determine the direction and strength of the relationship? 2. Find the Coefficient of determination. Explain the result (is it a useful model)? 3. Compute and draw Regression line model. 4. Compute the mean absolute error for this regression model.
The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in their name, from a sample of 311 people. x n 0 93 1 91 2 60 3 67 (a) Find the mean number of cars owned for this sample. Give your answer to at least 2 decimal places. (b) Find the standard deviation of cars owned for this sample. Give your answer to at least 2 decimal places.
The following data give the speeds (in kilometer) as measured by radar of 5 selected cars traveled at NLEX, 107, 100, 126, 120, 100 What is the standard deviation?
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 33 beats per minute, the mean of the listed pulse rates is x =74.0 beats per minute, and their standard deviation iss = 13.2 beats per minute. a. What is the difference between the pulse rate of 33 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 33 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between -2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 33 beats per minute significant? a. The difference is beats per minute. (Type an integer or a decimal. Do not round.) b. The difference is standard deviations. (Round to two decimal as needed.) c. The z score is z= (Round to two decimal places as needed.) d. The lowest pulse rate is
The following table shows the number of people that are either 18, 19, 20 or 21 years old, from a sample of 258 people. a) Complete the table. Age Number of people 18 54 19 69 20 70 21 (b Find the mean for this sample. Give your answer to at least 2 decimal places. (c Find the standard deviation for this sample. Give your answer to at least 2 decimal places.
The biologist wants to estimate the average age of Coyotes in Tuolumne County. Her estimates from past experience suggests the standard deviation is 1.3 years. How big of a sample should she take to be 95% sure his estimate is off by no more than 3minutes?
Jeff is doing an experiment involving mice. The mice weights have mean weight 3.74 ounces and standard deviation 0.026 ounces. Jeff selects 100 mice independently and calculates the sample mean, x̄, of their weights. What is the standard deviation of x̄?
The mean age of all 663 used cars for sale in a newspaper one Saturday last month was 7.5 years, with a standard deviation of7.1 years. The distribution ads, a reporter randomly selects 50 of these used cars and plans to visit each owner to inspect the cars. He finds that the mean age of the 50 cars he sam Complete parts a through c. a From the problem statement, which of the values 75,7.1, 7.9, and 5.6 are parameters and which are statistics? The value 7.5 is a The value 7.1 is a The value 7.9 is a The value 5.6 is a
New employees at a company are given a proficiency test. The test scores are approximately normally distributed with a mean of 350 and a standard deviation of 30. A new employee scores 389on the exam. What is the employee's z-score?

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

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

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

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

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

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

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS