14 Jun Question Unit 7, Topic 27, Exercise 2720
Question
Unit 7, Topic 27, Exercise 2720
Muscle Fatigue
Do women or men experience fatigue more quickly while exercising? To investigate this issue,
researchers recruited healthy young adults to participate in a study (Hunter et al., 2004). The
researchers first measured the strength of each person by the torque exerted at the wrist during amaximal voluntary contraction. Then they matched up each of the comparable strength (within men in the study with a woman ofof the maximal torque exerted). Next, they asked each subject tocomplete a prescribed series of exercises with their elbow flexor muscles and elbow extensor musclesuntil they lacked the strength to continue. Researchers recorded how long it took before failure at thisexercise task for each subject.
a. Calculate the correlation coefficient between time until muscle fatigue for men and time until musclefatigue for women.
Round your answer to three decimal places.
b. Comment on what this correlation coefficient suggests about whether men and women of similarstrength tend to have similar times until muscle fatigue.
The correlation coefficient suggests there is a strong, negative associationbetween fatigue times.
the absolute tolerance is +/0.001
Unit 7, Topic 28, Exercise 2832
The Kentucky Derby is the most famous horse race in the world, held annually on the first Saturday inMay at Churchill Downs race track in Louisville, Kentucky. This race has been called "The Most Exciting
Two Minutes in Sports" because that’s about how long it takes for a horse to run its
Consider the winning time (in seconds) for every year since 1896.
a. For predicting winning time from year, the least squares line has intercept coefficient
and slope coefficientmile track.
seconds
seconds per year. Use this information to report the equation of the
least squares line, using good statistical notation. Use "year" for the name of the predictor variable.
b. Based on the following residual plot, comment on whether a straight line appears to be a reasonablemodel for the relationship between winning time and year.
Unit 7, Topic 29, Exercise 2909
Draft Lottery
The United States Selective Service conducted a lottery to decide which young men would be drafted intothe armed forces (Fienberg, 1971). Each of thebirthdays of the year was assigned a draft number.
Young men born on days assigned low draft numbers were drafted. The correlation coefficient betweendraft number and sequential birthday for the 1970 lottery was
a. Determine the probability that a fair random lottery would produce a correlation coefficient so far fromzero, simply by random chance. In other words, determine the value for testing whether thepopulation correlation coefficient equals zero, against a twosided alternative. Report the test statistic aswell as the value. [Hint: There were numbers in this draft.]
Round the test statistic to two decimal places. Use thedistribution table to find a range for the
value. If there is no lower limit on thefor the lower limit. If there is no upper limit on the
Our website has a team of professional writers who can help you write any of your homework. They will write your papers from scratch. We also have a team of editors just to make sure all papers are of HIGH QUALITY & PLAGIARISM FREE. To make an Order you only need to click Ask A Question and we will direct you to our Order Page at WriteDemy. Then fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Fill in all the assignment paper details that are required in the order form with the standard information being the page count, deadline, academic level and type of paper. It is advisable to have this information at hand so that you can quickly fill in the necessary information needed in the form for the essay writer to be immediately assigned to your writing project. Make payment for the custom essay order to enable us to assign a suitable writer to your order. Payments are made through Paypal on a secured billing page. Finally, sit back and relax.
About Writedemy
We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.
How It Works
To make an Order you only need to click on “Order Now” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Are there Discounts?
All new clients are eligible for 20% off in their first Order. Our payment method is safe and secure.