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An automotive researcher wanted to estimate the difference required to come to a complete stop while traveling 40 miles per hour on wet versus dry pavement. Because car type plays a role, the researcher used eight different cars with the same driver and tires.  The braking distance (in feet) on both wet and dry pavement is shown in the table below. Conduct the appropriate hypothesis test to determine if the braking distance on the wet surface is longer from the braking distance on the dry surface. Use a 0.05 level of significance.  Note:  a normal probability plot of the data indicate that the differences are approximately normally distributed with no outliers.  This is a matched pairs problem.   Car 1 2 3 4 5 6 7 8 Wet 106 100 108 111 105 105 110 107 Dry 71 68 74 73 75 75 75 81   a. 

The American Federation of Teachers, publishes an annual salary report. In 2003, a sample of 51 teachers in California had mean salary with $56, 690 and a standard deviation of $9,000.  In Michigan of the same year, the mean salary for 61 teachers was $52, 000 with a standard deviation of $6000.  Test the hypothesis that the mean salary of teachers in California is greater than the mean salary of the teachers in Michigan.  Use a 0.05 significance level. We will assume that the California teachers are group 1.   a.

Environment Requirements A reliable internet connection is required for quizzes and exams. You are required to complete a webcam scan of your workspace where you will take the quiz or exam each time you take a proctored quiz or exam. A “workspace” is defined as your desk or tabletop, the walls that you are facing and next to you, including the monitor screen.  Workspace Scan Tutorial Video No other person is allowed to be in the same room while you are taking the proctored quiz or exam. The lighting in the room must be bright enough to be considered “daylight” quality. Overhead lighting is recommended. If overhead lighting is not available, the source of light must not be behind you. Webcam should be focused on the test taker and placed on a stable surface so that it will have a steady and uninterrupted view of the test taker.  Both of your hands must remain fully in view of the camera the entire time (except for the short time you are answering questions or switching between questions on Canvas). See the YouTube video below. Your microphone must remain turned on at all times. Sit at a clean desk or table. No writing on the desk or walls around you. The room should be as quiet as possible; hence no music or television will be permitted. No headphones or earbuds are allowed. You must not have listening devices in your ears. No wearing anything on your head — such as hats or hoodies that cover your ears. No smart glasses are allowed. The following items are not allowed to be on your desk or used during your proctored quiz or exam: Books Textbooks Notebooks Phones and other devices TI-84 Plus or TI-83 Plus is allowed on your tabletop to use. Your calculator must be at least partially in view of the camera at all times. The textbook Formula/Table card will be attached at the end of your quiz/exam for you to use. This Formula/Table card can be found in MyLab and Mastering, click on the left tab bar “Video & Resource Library,” click on “Learning Tools,” and in the middle of the page, under “Review,” you will see a link “View the Formula/Table Card from your textbook.” A blank 8.5” by 11” paper and pencil may be used for the purpose of scratch work only. You are not allowed to copy the questions of the quiz or exam on this piece of paper. If you choose to use a scratch paper, you must show this paper front and back in front of the webcam when you are asked to scan your desk and walls. Right after you complete the exam, you must show the used scratch paper front and back in front of the webcam before ending your quiz or exam. Please be aware that repeated exiting and restarting of an exam in Honorlock can appear unusual in the system and may be flagged as academic dishonesty.  Honorlock records all activity and any activity that seems out of the ordinary may be reviewed.  While I understand that occasional technical issues may happen, students should plan to complete their exam in one session without exiting Honorlock. If you do not follow the above rules your exam may not be scored and receive a grade of zero. NOTE: If you cannot meet these environment requirements or you are in a non-ideal environment, contact your professor.

You want to estimate the mean cost of a new cell phone.  Find a 99% confidence interval for the average price of a cell phone after you find a sample of 21 phones that have a mean price of $1150 with a standard deviation of $225.  Round your answer to the nearest dollar. Lower bound: [answer1] Upper bound: [answer2]

The above boxplot describes the square footage of one bedroom apartments that were rented over the past 12 months.  Answer the following: a.  Approximately what percentage of one bedroom apartments rented in the past 12 months were less than 1700 square feet? [answer1] b.  Approximately what percentage of one bedroom apartments rented in the past 12 months were between 1200 and 1700 square feet? [answer2] c.  What is the median for the square footage of one bedroom apartments? [answer3] d.  What is the approximate interquartile range? [answer4]

The date below represents the maximum wind speed (in knots) and atmospheric pressure (in millibars) for a random sample of hurricanes. that originated on the Atlantic Ocean. Atmospheric Pressure (MB) Wind Speet (knots) 993 50 995 60 994 60 997 45 1003 45 1004 40 1000 55 994 55 960 75 1006 30   a.  What is the value of r for this data sets? b.  Is r statistically significant? c.  What is the line of best fit? d. What is the best predicated wind speed of the atmospheric pressure is 1000 mb?    

If the 95% confidence interval for the mean cost of texts books per semester at a community college is between ($145, $645), what would be the appropriate conclusion sentence. a.  There is a 95% probability the mean cost of the textbooks at a community college are between $145 and $645. b.   We are 95% confident the mean cost of the textbooks at a community college are between $145 and $645. c.  There is a 95% chance the mean cost of the textbooks at a community college are between $145 and $645. d.   The the mean cost of the textbooks at a community college are between $145 and $645. Answer: [answer1]   Based on the above confidence interval would it be unusual for a student to spend $500 on textbooks for one semester at a community college? a.  No, because textbooks are expensive and who knows what you will spend. b.  Yes, because $500 is outside of the bounds for the 95% confidence interval and that would make spending $500 unusual. c.  No, because $500 is within of the bounds for the 95% confidence interval and that would make spending $500 usual. d.  Yes because $500 is within the bounds of the 95% confidence interval and that would make spending $500 unusual. Answer: [answer2]

The patellofemoral joint includes which bones?

Right now your thinking, ” this exam has to end!”  While your thinking that, explain to me the function of the patella in relation to the knee.  Don’t be short winded on this one.  Make sure to include everything you can.

Match the terms below.  You will use each description only once.