MATH 110 (MATH110)

A new drug is introduced that is supposed to reduce fevers. Tests are done with the drug. The drug is given to 60 people who have fevers. It is found that the mean time that it takes for the fever to get back to normal for this test group is 350 minutes with a standard deviation of 90 minutes. Find the 80% confidence interval for the mean time that the drug will take to reduce all fevers for all people. Answer the following questions: 1. Multiple choice: Which equation would you use to so...

Suppose that you are attempting to estimate the weight of 600 parts. In order to use the infinite standard deviation formula, what sample size, n, should you use? Your Answer: n < .05 n < .05 600 n (.05) 600 n < 30 Sample size must be less than 30 In order to use infinite standard deviation formula, we must have: n — 0.05 n — 0.05 600 n 0.05(600) 30 So, the sample size must be less than 30. Question 2 O I O ptsSuppose that you take a sample of size 15 from a p...

ou may find the following files helpful throughout the exam: Statistics_Equation_Sheet The following pie chart shows the percentages of total items sold in a month in a certain fast food restaurant. A total of 2900 fast food items were sold during the month. a.) How many were burgers? b.) How many were fish? Your Answer:Question 2 Not yet graded / 10 pts notes 2,900 fast food burger 12% fish 28 % burger 2,900(.12)=348 Fish 2,900 (.28)=812 a.) Burgers : 2900(.12) = 348 b.) Fish : 2...

Suppose we have independent random samples of size n = 615 and n = 505. The proportions of success in the two samples are p = .53 and p = .45. Find the 90% confidence interval for the difference in the two population proportions. Answer the following questions: 1. Multiple choice: Which equation would you use to solve this problem? A. B. C. D. 2. List the values you would insert into that equation. 3. State the final answer to the problem

You may find the following files helpful throughout the exam: Statistics Equation Sheet ( picture/Statistics standard normal table ( picture/standardn t-table ( picture/) Critical values chart ( v;

You may find the following files helpful throughout the exam: Statistics Equation Sheet ( picture/Statistics During an hour at a fast food restaurant, the following types of sandwiches are ordered: Turkey Turkey Cheeseburger Hamburger Fish Chicken Hamburger Cheeseburger Fish Hamburger Turkey Fish Chicken Item Frequency Turkey 9 Cheeseburger 7 Hamburger 9 Fish 19 Chicken 9 Total 53Chicken Fish Turkey Fish Hamburger Fish Cheeseburger Fish Cheeseburger Hamburger Fish Fish Cheeseburg...

You may find the following files helpful throughout the exam: Statistics Equation Sheet ( picture/Statistics Suppose you are going to make a password that consists of 6 characters chosen from {3,4,5,7,d,f,g,k,q,r,s,w}. How many different passwords can Your Answer: P(490, 2) 490! (490-2)! 490! 490 (489) 488! ¯ 239, 610 a) b) c (670, 665) — 670! 670! 670!5! ¯ 670(669) (668) (667) (666) 5(4) (3) (2) (1) — 1.1( a. 490! 490(489) = 239,610. (490- 2)! 499! b. 670! 67...

Find the value of X2 for 14 degrees of freedom and an area of .01 in the right tail of the chisquare distribution. Your Answer: X2=29.141 Solution. Look across the top of the chi-square distribution table for .01, then look down the left column for 14. These two meet at X2 =29.141. Question 2 0 / 0 pts Find the value of X2 for 8 degrees of freedom and an area of .05 in the left tail of the chisquare distribution. Your Answer: 1-.05=0.95 X2=2.733 Solution. Since the chi-square distribut...

Define the null and alternative hypothesis for the following. Also, explain what it would mean to make a Type I error and explain what it would mean to make a Type Il error. The newspaper in a certain city had a circulation of 20,000 per day in 2010. You believe that the newspaper's circulation is less than 20,000 today. b) Define the null and alternative hypothesis for the following. Also, explain what it would mean to make a Type I error and explain what it would mean to make a Type ...