例题7A researcher constructed a 95 percent confidence interval for the mean number ofalfalfa weevils on an alfalfa plant within a field. Based on 80 randomly selectedalfalfa plants, the researcher found an average of 2.5 alfalfa weevils per plant andcomputed the 95 percent confidence interval to be 1.50 to 3.50. Which of thefollowing statements is a correct interpretation of the 95 percent confidence level?(A) Approximately 95 percent of alfalfa fields sampled will have an average of 1.50to 3.50 alfalfa weevils per plant, but nothing can be said about the sample meannumber of alfalfa weevils for this or any other field.(B) Approximately 95 percent of alfalfa fields sampled will have an average of 1.50to 3.50 alfalfa weevils per plant. The sample mean for this field was 2.50 alfalfaweevils per plant, but the sample means for other fields may be different.(C) If we repeatedly sampled this field, taking samples of 80 plants and constructing95% confidence intervals, then, approximately 95 percent of these intervals wouldinclude 2.5, the mean for the sample described above.(D) If we repeatedly sampled this field, taking samples of 80 plants and constructing95% confidence intervals, then, approximately 95 percent of these intervals wouldinclude the population mean number of alfalfa weevils on an alfalfa plant in this field.(E) If we repeatedly sampled this field, taking samples of 80 plants and constructing95% confidence intervals, then, approximately 95 percent of these intervals wouldinclude the sample mean for that sample.

The 95% confidence interval for the population mean is (1.50, 3.50)

Answered: A researcher constructed a 95 percent…

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

A learn-to-type software program claims that it can improve your typing skills. To test the claim and possibly help yourself out, you and eight of your friends decide to try the program and see what happens. Use the table below to construct an 85%85% confidence interval for the true mean change in the typing speeds for people who have completed the typing program. Let Population 1 be the typing speed before taking the program and Population 2 be the typing speed after taking the program. Round the endpoints of the interval to one decimal place, if necessary. Typing Speeds (in Words per Minute) Before After 42 33 41 54 31 50 30 48 41 31 49 52 34 54 48 49 39 48
A survey of 2450 golfers showed that 281 of them are left-handed. Construct a 90% confidence interval for the proportion of golfers that are left-handed. Question 10 options: (0.104, 0.125) (0.369, 0.451) (0.100, 0.130) (0.203, 0.293)
The average gold content from an ore sample in 36 different locations is found to be 2.6 grams per ton. a. Find the 95% and 99% confidence intervals for the mean gold content in that area. Assume that the population variance is 0.09.
The class collected their data and found the mean of the dominant forearm maximum force was 34.2 +-3.4 kg . The mean non-dominant forearm maximum force was 28.5 +- 7.8 kg for their 95% confidence intervals. Would you conclude that the means are different?
A newspaper article reported that 400 people in one state were surveyed and 70% were opposed to a recent court decision. The same article reported that a similar survey of 500 people in another state indicated opposition by only 40%. Construct a 95% confidence interval of the difference in population proportions based on the data.
Afra is working in a bank. She has randomly contacted 36 customers and has examined their average annual salary. She found that the average salary of this sample of customers is $68200 with a sample standard deviation of $2375. She needs to report the population average at 95% confidence interval. What is the range that she should report?
A random sample of high school seniors were asked whether they were applying for college. The resulting confidence interval for the proportion of students applying for college is (0.65,0.69). What is the margin of error?
A graduate student wanted to estimate the average time spent studying among graduate students at her school. She randomly sampled graduate students from her school and obtained a 99% confidence interval of (17.3,22.5) hours/week. In the context of the problem, which of the following interpretations is correct? Choose the correct answer below. A. Approximately 99% of all random samples of graduate students from this school will give a mean number of hours studied per week between 17.3 and 22.5. B. We are 99% sure that the average amount of time spent studying among graduate students at this student's school is between 17.3 and 22.5 hours per week. C. At this student's school 99% of all graduate students study between 17.3 and 22.5 hours per week, on average. D. Graduate students at this student's school study between 17.3 and 22.5 hours per week 99% of all weeks during the year. E. There is a 99% chance that the average…
In the construction of an 88% Confidence Interval for a population mean u, a has the value of
Out of a sample of 760 people, 367 own their homes. Construct a 95% confidence interval for the population mean of people in the world that own their homes. A CL

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