Question

1. Correlations and Scatter Plots

The following data set represents avg time per week spent on social
media by age for 12 randomly chosen individuals.

Age 14 18 27 21 55 46 18 26 15 17 62 41 Time (s) 240 150 135 110 45
72 150 41 200 125 31 52

a. The correlation coefficient between the two variables is found
to be r = -0.84, and the standard deviation for each variable are
Sage = 16.71 and Stime = 64.1. Determine the equation for the best
fit line. ( To receive full points, you must show all your
calculations)

b. How much time on social media does your model predict for a
21-year-old? Compare the predicted value to the observed value by
calculating the residual value.

2. Sampling methods

a) A researcher is investigating the effects of online learning on
K-12 education. He plans to conduct a survey that will be emailed
to all parents and teachers of students by the school
administrators. He decides to randomly select four schools in the
district with approximately 400 students. The parents and teachers
of all the students at these schools will be surveyed. Describe the
sampling method being used and possible sources of sampling bias in
his design.

b) A health care provider is conducting a study on the recovery
process for patients who had knee surgery in their outpatient
centers within the last six months. He needs a sample size of 250
and his plan is to randomly select the individuals from eight age
groups 18-25, 26-30, 31-35, 36-40, 41-45, 46-50, 51-55 and 55+ from
the patient database. Once selected the researcher will locate
their records and follow up with a phone interview. If two age
groups accounted for 50% of all the participants surveyed in the
study comment on the sampling method used and the sampling
biases.

Answer #1

1- Which of the following statements about eating disorders and
puberty is FALSE?
Multiple Choice
Male body fat naturally increases during puberty in response to
hormones.
Female body fat naturally increases during puberty in response
to hormones.
Puberty increases muscle mass and definition for boys.
A body fat increase from 12 to 25 percent during puberty is
considered healthy for girls.
2-Although men diet, they do so for different reasons than
females do. Males tend to focus their attention on...

Question 1) Which of the following are considered valid
criticisms of the legalistic model of crime and criminology?
a. Law in action departs substantially from the ideal behavior
of the law.
b. Focusing only on legally criminalized behavior makes it
impossible to consider the impact of gender, race, age and
ethnicity.
c. Legalistic definitions ignore acts that cause great harm.
d. The legalistic model suggests that these are absolute
standards for judging right and wrong.
e. All of the above....

MATHEMATICS
1. The measure of location which is the most likely to
be
influenced by extreme values in the data set is the a. range
b.
median c. mode d. mean
2. If two events are independent, then a. they must be
mutually
exclusive b. the sum of their probabilities must be equal to one
c.
their intersection must be zero d. None of these alternatives
is
correct. any value between 0 to 1
3. Two events, A and B,...

In narrative essay format, I want you to address a
business/organization case study using multiple concepts from
class. The case question and case text begin on page 5 of this
document. You need to demonstrate their best understanding of
management and organizational behavior theory, and the application
of those ideas to improve the understanding of various issues. You
need to clearly identify at least 3 distinct, substantive
issues.
For each issue you need to 1), identify evidence from the case...

Bivariate Data & Probability
After completing the calculation by hand in Q1 you can use
Excel to check your answers before submitting. Q2 assesses your
general understanding of probability and linear associations using
Excel to analyse a large dataset.
Question 1
Covariance and Correlation
The table below shows a set of sample bivariate data. Calculate
the covariance and correlation coefficient by completing the below
table. Show all working.
X
Y
(X - )
(Y - )
(X - )(Y -...

What topics are covered in the following
article?
Please answer within 5 hours. It is extremely
urgent!!!!!!!!!!!!!!!!!!!!!!!!
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BIOETHICS.
Bioethics as a field is relatively new, emerging only in the
late 1960s, though many of the questions it addresses are as old as
medicine itself. When Hippocrates wrote his now famous dictum
Primum non nocere (First, do no harm), he was grappling
with one of the core issues still facing human medicine, namely,
the role and duty of the physician....

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