Problem 3: The Department of Education just adopted a new standard. Some educators believe that the new standard will help improve student achievement, yet others believe that it will put more students at risk. For many decades, the mean SAT score is 1100. However, educators are not sure whether the new standard will make it better or worse. During the first two years of the implementation of the new standard, researchers randomly selected 43 students and found that the mean SAT score is 1150 with a standard deviation of 110. a) Do we have some evidence to suggest that the new standard changed student achievement? Explain. b) Perform a hypothesis test at a significance level, alpha = 0.05. (Be careful with the alternative hypothesis) %3D

Problem 3: The Department of Education just adopted a new standard. Some educators believe that the new standard will help improve student achievement, yet others believe that it will put more students at risk. For many decades, the mean SAT score is 1100. However, educators are not sure whether the new standard will make it better or worse. During the first two years of the implementation of the new standard, researchers randomly selected 43 students and found that the mean SAT score is 1150 with a standard deviation of 110. a) Do we have some evidence to suggest that the new standard changed student achievement? Explain. b) Perform a hypothesis test at a significance level, alpha = 0.05. (Be careful with the alternative hypothesis) %3D

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

Please help with the solutions to questions 1-3.
I am really struggling with problem 1-5
For problem 10, 11, and 12 below: (i) State the requirement (ii) State the null and alternative hypotheses with the correct symbols (iii) Write all the statistics (iv) Write the formula of the test statistic and find the test statistic (you may use a calculator, but you are required to write down the command and all the numbers you enter) (v) Find the critical value or the P-value (you may use a calculator, but you are required to write down the command and all the numbers you enter) (vi) Decide to reject or fail to reject Ho and explain the reason (vii) Wording the conclusion (viii) Answer the question based on your result above 10. Use the P-value method to test the claim that for the adult population of one town, the mean annual salary is $30,000. Sample data are summarized as n = 17, T = $22,300 and s = $14,200. Use a significance level of a = 0.05. Is the assumption correct? 11. A manufacturer uses a new production method to produce steel rods. A sample of 17 steel rods resulted…
Solve on excel.
I am having trouble figuring out question d and e.
Problem 1. A student has to attend a total of 15 lectures a week (Monday through Friday), and she should attend at least 3 classes on Monday, at least 4 on Wednesday and at least 2 on Friday. (a) In how many ways can she do this? (we are just interested in the number of classes per day, not which ones) (b) In how many ways can she do this if there is at most one lecture on Tuesday she can take?
2)
Professor Hickey assigned two homework problems to a class of 45 students. At the next meeting, 11 indicated that they had worked the first problem, 15 had worked the second problem, and 7 had worked both. (a) Determine the number who worked at least one of the problems. X students (b) Determine the number who worked only the first problem. 4 students (c) Determine the number who worked exactly one of the problems. X students (d) Determine the number who worked neither of the problems. X students
PROBLEM 4 A group of four friends goes to a restaurant for dinner. The restaurant offers 12 different main dishes. (i) Suppose that the group collectively orders four different dishes to share. The waiter just needs to place all four dishes in the center of the table. How many different possible orders are there for the group? (ii) Suppose that each individual orders a main course. The waiter must re- member who ordered which dish as part of the order. It's possible for mor than one person to order the same dish. How many different possible orders are there for the group? ore How many different passwords are there that contain only digits and lower-cas letters and satisfy the given restrictions? (iii) Length is 7 and the password must contain at least one digit. (iv) Length is 7 and the password must contain at least one digit and at least one letter.
Problem 3: Dear Abby Letter Dear Abby: You wrote in your column that a woman is pregnant for 266 days. Who said so? I carried my baby for ten months and five days, and there is no doubt about it because I know the exact date my baby was conceived. My husbönd is in the Navy and it couldn't have possibly been conceived any other time because I saw him only once for an hour, and I didn't see him again until the day before the baby was born. Dear Abby I don't drink or run around, and there is no way this baby isn't his, so please print a retraction about the 266- day carrying time because otherwise I am in a lot of trouble. San Diego Reader Abby's answer was consoling and gracious but not very statistical: Dear Reader: The average gestation period is 266 days. Some babies come early. Others come late. Yours was late. At the time of the letter, the duration of pregnancy (the time elapsed between conception and birth) was approximately normally distributed with a mean of 266 days and a…
Answer the following questions, similar to those found in problem 23 of section 2.3 in your text. Assume that there are 9 girls and 8 boys in the neighborhood club, and a team of 6 is to be selected. How many different teams can be selected? How many different teams can be selected if each team must contain exactly 2 girls and 4 boys? How many different teams can be selected if each team must contain both boys and girls?
I need help with these questions because im still having trouble understanding this lesson.