A scientific study was conducted to determine the hours of sleep that college students get per night. Thestudy surveyed 20 college students and obtained the following data:8.4, 8.4, 9.5, 7.2, 8.8, 7.4, 7.7, 8.4, 8.7, 7.5, 8.7, 8.6, 8.3, 7.7, 8.8, 8.1, 8.4, 8.6, 8.2, 7.5Assuming the population standard deviation is o = 0.71, construct a 98% confidence interval for theaverage hours of sleep per night that college students get.2ΖαMargin of Error: E =We are 98% confident that college students get an average of betweenhours andhours of sleep per night.

Answered: Image /qna-images/answer/296458f6-e75e-413b-96a5-b9814c4bf7da.jpg

Answered: 2 Margin of Error: E = We are 98%…

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

90% confidence
Spam: A researcher reported that 71.8% of all email sent in a recent month was spam. A system manager at a large corporation believes that the percentage at his company may be 77%. He examines a random sample of 500 emails received at an email server, and finds that 361 of the messages are spam. Can you conclude that the percentage of emails that are spam is less than 77% ? Use both a = 0.05 and a = 0.10 levels of significance and the P-value method with the TI-84 Plus calculator. Part: 0 / 5 Part 1 of 5 (a) State the appropriate null and alternate hypotheses. Ho: H₁: This hypotheses test is a (Choose one) test. 0<0 ☐#0 X □<口 р 0=0 Ś
The pH factor is a measurement of how acidic or alkaline water is. A reading of 7.0 indicates neutrality; values above 7.0 suggest alkalinity; and values below 7.0 indicate acidity. According to one study, the optimum likelihood of capturing bass occurs when the pH of the water is between 7.5 and 7.9. Let's say you fear acid rain is lowering the pH of your favorite fishing site, and you want to see if it's less than 7.5. You obtained 10 samples and got the following data: 7.3, 7.4, 7.2, 7.0, 7.5,7.4,7.3,7.3,7.2 and 7.1. Use 0.05 alpha. a. State the alternative and null hypothesis. b. Is the pH level of the water samples less than 7.5?
evicard The use of both alcohol and tobacco by high school senibrs has declined in the last 30 years. Alcohol use is down from 68.2% to 43.1%, and the use of cigarettes by high school seniors has decreased from 36.7% to 20.4%. A random sample of 300 high school seniors from a large city indicated that 54 had smoked a cigarette during the 30 days prior to the survey. At the a = 0.05 level of significance is this lower than the national average?
The first test a doctor would order to determine whether a person is infected with HIV (the virus that causes AIDS) is the ELISA test. It detects antibodies and antigens for HIV. A study in Statistical Science by J. Gastwirth estimated that, if the person is actually infected with HIV, this test produces a positive result 97.7% of the time. If a person is not infected with HIV, the test result is negative 92.6% of the time. According the the US Centers for Disease Control (CDC), an estimated 1.1 million Americans out of a population of 321 million were infected with HIV in 2015. Using the information above, determine the probability that a randomly selected person whose ELISA test is positive actually is infected with HIV? a. What is the probability that a randomly selected American is infected with HIV? b. Using the answer to part (a) and the conditional probabilities of positive and negative ELISA test results, fill out the contingency table below: ELISA Test Result…
Can you please check my work
Part 4 of 4 Summarize the results. There (Choose one) enough evidence to conclude that the second-graders in the superintendent's school district have h the nationwide average. differe is is not
Suppose the relationship between Y and X is given by: Y = 4 + 3.2*X + error By how much does the expected value of Y change if X increases by 10 units? (Round your answer to two decimal places: ex: 123.45)
Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What can you say is most likely true about GPAs in our class?
An asset has 0.5% chance of attack and 20% chance of the attack being successful if it happens. The asset is valued at 25 on a hundred-point scale. If an attack happens and is successful, then the asset loses 75% of its value. It is further given that the give data is 90% accurate. Calculate the risk. give clear handwritten answer!
Q-4)Show all the steps for the problem.
Exercise: The average life of a stove manufactured by GE is 15 years with a s.d. of 2.5 years. (d) Calculate the 96th percentile (e) What percentage of stoves will last between 16 and 20 years?

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

2 Margin of Error: E = We are 98% confident that college students get an average of between hours and hours of sleep per night.