CSUF Public Health Statistics Questions

PH 7B Public Health Statistics II
Homework 1
Question 1 (5 pts): Which of the following correlation coefficients shows the strongest
relationship?
A. 0.68
B. -0.05
C. 0.50
D. -0.96
Explain:
Question 2 (5 pts): True or False: If y is usually greater than x, the correlation coefficient
between x and y will be positive.
Ture or False:
Explain:
Question 3 (5 pts): The correlation coefficient between body weight and blood pressure for
men was about 0.70; for the women, it was about the same. If you take the average of men and
women, respectively, the correlation coefficient between body weight and blood pressure would
be___________
A. About 0.70 B. Between 0.50 – 0.70 c. Higher than 0.70
Explain:
Question 4 (5 pts):True or False: In a study of students’ GPA among students from 10 different
majors at UCI, the average GPA is 3.7 in Biological Science while the average GPA is 3.6 in
Engineering. So the data shows that on average, the instructors in Biological Science are doing
a better job in teaching than the instructors in the Engineering department.
True or False:
Explain:
PH 7B Public Health Statistics II
Homework 1
Question 5 (15 pts): The table below records the minutes of exercise per day and hours of
sleep during weekdays and weekends in a research study. (use n=7, keep one decimal place)
Participant ID
Weekdays
Weekends
Exercise
(min)
Sleep
(hours)
Exercise
(min)
Sleep
(hours)
1
40
7
65
7
2
80
9
45
8
3
75
8
75
6
4
60
7
80
9
5
45
8
50
7
6
90
7
20
9
7
55
6
35
8
1) Find out the correlation coefficient between hours spent on exercise and hours of sleep
during weekdays and weekends, respectively. Show your work.
2) On what days (weekdays or weekends), hours spent on exercise is more strongly
correlated with hours of sleep? Why?
3) The same group of participants all decided to extend 20 minutes of exercise everyday
during weekdays and double the amount of their exercise time on the weekend.
However, they found out their sleep time still remained the same. Calculate the new
correlation coefficients for both groups and explain how it differs from the previous
schedule.
PH 7B Public Health Statistics II
Homework 1
Question 6 (15pts): There was a health study among the senior population in Orange County,
where a large group of individuals have their systolic blood pressure (SBP) measured at age 65
and again at age 75. The following results are obtained.
Age 65: average SBP = 140 mmHg, SD=5 mmHg
Age 75: average SBP = 145 mmHg, SD=7.5 mmHg
r=0.80
1) Estimate the average SBP at age 75 for all the individuals who had SBP of 145 mmHg at
age 65.
2) Predict the SBP at age 75 for an individual who had SBP of 135 mmHg at age 65.
3) Another person aged 65 from New York City, with an SBP of 150 mmHg, would like to
know his systolic blood pressure in 10 years based on your research results. Would you
be able to help him calculate it? If so, write down your prediction. If not, explain why.

Don't use plagiarized sources. Get Your Custom Essay on
CSUF Public Health Statistics Questions
Just from $13/Page
Order Essay
Achiever Essays
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

Calculate the price of your order

Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

Essays

Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.

Admissions

Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.

Reviews

Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.

Reviews

Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.

Live Chat+1(978) 822-0999EmailWhatsApp

Order your essay today and save 20% with the discount code RESEARCH

slot online