A cell phone service provider claims that only 1% of their calls get "dropped" (i.e., neither partyhangs up, but the connection is lost). You work for the Consumer Protection Agency, andbelieve that the percent of dropped calls from this provider is higher than 1%. Your agency hasbeen granted access to this company's detailed call records. It takes careful examination of eachcall transaction to determine if the call can be considered a "dropped call", so you are not able toeasily calculate the actual percent of dropped calls directly from the entire database of millionsof calls. So, you decide to take a random sample of 2500 calls, and each call is classified as"dropped" or "not dropped". Of the 2500 calls examined, 1.462% of them were classified as"dropped". Calculate the appropriate test statistic. Enter with 2 decimals (eg. 1.96).

Given data sample size, n =2500 population proportion,p= 0.01 Significance level, α=…

Answered: able to easily calculate the actual…

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

Students in a small statistics class were asked which was their dominant hand and if they were in a STEM (science, technology, engineering, and math) major. Their results are listed below. Round to 4 decimal places. Right Left Total STEM, Yes 6 1 7 STEM, No 7 2 9 Total 13 3 16 a. What is the proportion of students in the class that are right handed? b. What is the proportion of left handed students in the class that are in STEM?
in the highest 2.5 percent eat? What is the z-score?
Suppose that 19% of all athletes in a sport use a banned drug. A test is available that detects 88% of athletes who use the drug. But the test also gives a positive result for 9% of those who do not use the drug. What percent of athletes who test positive for the drug are actually using the drug? Answer: %
d. Give a 95% interval estimate of the number of fatal accidents per 1000 licenses in a city where 15% of the licensed drivers are under 21.
You want to estimate the proportion of home accident deaths that are caused by falls. How many home accidents must you survey in order to be 94% confident that your sample proportion is within four percentage points of the true population proportion?
Polls. America OnLine published a survey question. Among the 2,300 Internet users who responded, 20% answered “yes” and the others answered “no.” For the “yes” responses, what is the value of pn? What is fundamen-tally wrong with this survey?
A company wanted to estimate the proportion of employees who use mass transit to get to work. The company conducted a survey of employees and 184 of 400 employees indicated they use mass transit to get to work. Find the standard error for the sample proportion of employees who use mass transit. Enter your answer as a decimal rounded to 3 decimal places. Select the correct answer below: a. 0.032 b. 0.460 c. 0.249 d. 0.025
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 99% confident that the sample percentage is within 3.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. n = 1356 (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 31% of air passengers prefer an aisle seat. n = (Round up to the nearest integer.)
In order to study the mean blood pressure of people in his town, Richard samples the population by dividing the residents by age and randomly selecting a proportionate number of residents from each age group. Which type of sampling is used?
u refers to the population mean while x refers to the sample mean O A. True O B. False ts ft or 2
Suppose that 9% of all athletes in a sport use a banned drug. A test is available that detects 94% of athletes who use the drug. But the test also gives a positive result for 8% of those who do not use the drug. What percent of athletes who test positive for the drug are actually using the drug? Answer: 77.28 %
In 2016 the Better Business Bureau settled 84% of complaints they received in the United States. Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is 0.84, the same as the overall proportion of complaints settled in 2016. Use the z-table. a. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p. E(p) (to 2 decimals) (to 4 decimals) b. Based upon a sample of 200 complaints, what is the probability that the sample proportion will be within 0.04 of the population proportion (to 4 decimals)? probability : = c. Suppose you select a sample of 460 complaints involving new car dealers. Show the sampling distribution of p. E(F) (to 2…

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