According to the website, "About 25 percent of college students report academicconsequences of their drinking including missing class, falling behind, doing poorly on exams or papers, and receiving lower gradesoverall." A statistics student is curious about drinking habits of students at his college. He wants to estimate the mean number ofalcoholic drinks consumed each week by students at his college. He plans to use a 90% confidence interval. He surveys a randomsample of 71 students. The sample mean is 3.93 alcoholic drinks per week. The sample standard deviation is 3.78 drinks.Let's do some exploration with technology to see how changes in the confidence level affect the confidence interval. Use theapplet below to answer the following questions.↓पं-♡Central probability = 0.50Ņ-1PO.t-score = 0.6750central probability=degrees of freedom =20.5050-♡3 Answer the following question about this study. Use the applet above, if necessary.Which of the following is an appropriate conclusion we can draw from this confidence interval?We are 90% confident that the mean number of alcoholic drinks consumed by all students at this college during the previous week is between3.18 and 4.68.We are 90% confident that the mean number of alcoholic drinks consumed by all college students in the U.S. during the previous week isbetween 3.18 and 4.68.We are 90% confident that each student at this school consumed between 3.18 and 4.68 alcoholic drinks in the previous week.We expect 90% of all students on the campus to have consumed between 3.18 and 4.68 alcoholic drinks in the previous week.

Answered: Image /qna-images/answer/6531b88b-d1eb-4371-a4e2-5cd3aada4c18.jpg

Answered: According to the website , "About 25…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A survey of 97 random homeowners in my neighborhood had a mean of $720 spent on lawn care. Construct a 98% confidence interval for the mean lawn care expenditure per household when the population variance is $400.
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Several years ago, 41% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,195 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,195 surveyed, 487 indicated that they were satisfied. Construct a 90% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: p versus H1:p (Round to two decimal places as needed.)
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Several years ago, 44%of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,195parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,195 surveyed, 474 indicated that they were satisfied. Construct a 95%confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Upper H 0H0: p ▼ less than< greater than> not equals≠ equals= nothing versus Upper H 1H1: p ▼ not equals≠ less than< equals= greater than> nothing (Round to two decimal places as needed.)

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