We would like to know: "What percentage of college students drink alcohol every day?" In a random sample of 500 students, 75 said they drink alcohol every day. Use the data to construct a 95% confidence interval to answer to the question. You MUST show your work to receive full credit.
In: Statistics and Probability
Physiology of Exercise
11. An elite powerlifter would most likely have a higher percentage of which fiber type?
12. Explain blood glucose homeostasis during exercise. Talk about the hormone involved and the actions they take to control our blood glucose.
13. How do athlete's differ from the general population in hormone and receptor number.
14. What are some of the common fare markers (fats & triglycerides) that are seen in a blood test and what do they mean and how can someone change those levels.
In: Anatomy and Physiology
Find the sample size needed to estimate the percentage of Virginia residents who are left-handed. Use a Margin of Error of 3% and use a confidence level of 90% for both situations as follows.
a. Assume phat is unknown
b. Based on prior studies, use phat= 12%
In: Statistics and Probability
Voter turnout, or the percentage of eligible voters who actually exercise their vote, hovers around 50 percent in US presidential elections. And the turnout is much lower among those who are between the ages of 18 and 25. Discuss the reasons for why so many people do not bother to exercise their vote. Could it be that our political system with its Electoral College and two major parties makes an individual’s vote appear insignificant? And is it the belief that one vote doesn’t really matter that leads to mass social loafing? There is a list of factors that have been shown to reduce social loafing. Which ones could be applied to encourage more people to participate in elections? What in your opinion will be the impact of Internet voting on turnout among the young in future presidential elections?
In: Psychology
2. (9 pts) It is difficult to determine a person’s body fat percentage accurately without immersing him or her in water. Researchers hoping to find ways to make a good estimate immersed 20 male subjects, then measured their weights shown in the table.
(2 pts) Determine the linear correlation coefficient.
(4 pts) Find the least-squares regression line.
(2 pts) Interpret the slope and y-intercept if appropriate.
(1 pts) Predict the body fat percentage if the weight is 190 lb.
|
Weight (lb) |
Body Fat (%) |
|
175 |
6 |
|
181 |
21 |
|
200 |
15 |
|
159 |
6 |
|
196 |
22 |
|
192 |
31 |
|
205 |
32 |
|
173 |
21 |
|
187 |
25 |
|
188 |
30 |
|
188 |
10 |
|
240 |
20 |
|
175 |
22 |
|
168 |
9 |
|
246 |
38 |
|
160 |
10 |
|
215 |
27 |
|
159 |
12 |
|
146 |
10 |
|
219 |
28 |
In: Statistics and Probability
In 2011-2015, mutual fund manager, Diana Sauros produced the following percentage rates of return for the Mesozoic Fund. Rates of return on the market index are given for comparison. 2011 2012 2013 2014 2015 Fund −1.3 +25.0 +41.0 +12.0 +0.4 Market index −1.0 +17.0 +32.0 +11.3 −0.8 Calculate (a) the average return on both the Fund and the index, and (b) the standard deviation of the returns on each. (Do not round intermediate calculations. Round your answers to 2 decimal places.)
In: Finance
A child psychologist wishes to estimate the percentage of fathers who watch their preschool-aged child when the mother works. What size sample should be obtained if she whises the estimate to be within 3 percentage points with 97% confidence if
A. she uses a 2005 estimate of 82% obtained from the U.S Census Bureau?
Z= n=
B. She does not use any prior estimates.
n=
In: Statistics and Probability
The following table summarizes prices of various default-free zero-coupon bonds (expressed as a percentage of the face value):
Maturity (years) 1 2 3 4 5
Price (per $100 face value) $95.06, $90.74, $86.20, $81.41, $76.40
a. Compute the yield to maturity for each bond.
b. Plot the zero-coupon yield curve (for the first five years).
c. Is the yield curve upward sloping, downward sloping, or flat?
In: Finance
The percentage of cotton in material used to manufacture men's shirts follows. Construct a stem-and-leaf display for the data. Calculate the median and quartiles of these data. Choose the correct answer.
| 33.6 37.0 34.0 32.1 33.5 35.6 34.9 35.4 32.2 36.1 34.7 32.4 33.9 36.8 32.3 33.7 34.8 36.9 34.4 33.5 33.5 37.5 32.6 34.9 35.8 32.9 35.0 37.2 35.3 35.2 32.7 33.2 36.9 34.7 36.9 33.9 34.7 36.0 34.0 35.1 34.0 36.5 36.8 32.1 35.9 32.6 36.0 36.7 34.1 34.2 35.9 32.9 34.8 32.3 36.8 35.0 32.0 36.0 33.4 33.8 34.6 34.7 36.2 34.1 |
In: Statistics and Probability
1. What percentage of a drawn blood sample would be plasma after it has been spun down in the centrifuge?
2. LIST Three factors that affect Stroke Volume. b. LIST Three factors that affect Heart Rate? What is EDV? What is ESV?
In: Anatomy and Physiology