Question

In a study of parents who have children with attention deficit hyperactivity disorder (ADHD), 120 parents were asked to rate their overall stress level using the Parental Stress Scale (PSS). A higher score on the PSS scale indicates greater stress. The average stress level from the sampled parents was 52.98. The standard deviation of stress levels for the population of parents who have children with ADHD is known to be 10.34. Does the data provide convincing evidence that parents who have children with ADHD are extremely stressful? Note that a score on the PSS scale greater than 45 represents extreme stress. Conduct a hypothesis test at a 1% significance level. Make sure to check the required conditions and show all steps of hypothesis test properly (in the correct order as shown below).

(explanation please)

o Check the required conditions for a hypothesis test to determine if they are satisfied.

o Conduct a hypothesis test

- Describe the paramter ?? in words, and state the hyptheses using ??.

- Calcualte the test statistic and the p-value

- Determine whether we whouild reject the null OR fail to reject the null at 1% level

- Write an appropriate conclusion in the context of the problem.

Answer #1

Attention deficit hyperactivity disorder (ADHD) in young
children presents significant challenges to the children, their
parents, and their classroom teachers. Stimulant medication can
effectively treat 60% to 70% of youth with ADHD. Yet many parents
seek alternative therapies, and Hypericum perforatum (St John's
wort) is 1 of the top 3 alternative therapies used.
In a recent study in the Journal of the American Medical
Association, Hypericum perforatum (St John's Wort) for
Attention-Deficit/Hyperactivity Disorder in Children and
Adolescents, 2008;299(22):2633-2641, the authors...

Researchers have discovered that children experiencing Attention
Deficit Hyperactivity Disorder (ADHD) show improvements if they
attend classes on involving behavioral and social skills, compared
to a group of ADHD children who did not attend the classes.
The group of children who attended the classes
constitute the
options:
experimental group.
independent group.
control group.
placebo group.

Researchers have discovered that children experiencing Attention
Deficit Hyperactivity Disorder (ADHD) show improvements if they
attend classes on involving behavioral and social skills, compared
to a group of ADHD children who did not attend the classes.
The group of children who did not attend the classes constitute
the
options:
experimental group.
independent group.
control group.
randomized group

"Parents who constantly check mobile phones will raise children
with short attention spans."
1. To adequately test this hypothesis, a researcher would
conduct a(n)
2.The independent variable in this hypothesis is
3.The dependent variable in this hypothesis is
4. If designing an experiment with an experimental and control
group, the control group is the group who......... checking mobile
phones
Correlations
5.If you conducted correlational research and found a
correlation of r = -.72 between amount of parental phone checking
and...

Check you please answer the following question
Many parents have turned to St. John’s wort, an herbal remedy,
to treat their children with attention deficit hyperactivity
disorder (ADHD). The Journal of the American Medical
Association (June 11, 2008) published an article that explored
the herb’s effectiveness. Children with ADHD were randomly assigned
to take either St. John’s wort capsules or placebos. The
contingency table below broadly reflects the results found in the
study. (You may find it useful to reference...

10. (10pts) The Department of Children and Families reports that
30% of children have Attention Deficit Disorder (ADD). We conduct a
research study in an attempt to prove that it is greater. In a
sample of 150 children, we found that 57 children have ADD.
(a) (2pts) Develop the null and alternative hypotheses:
(b) (2pts) Using α = 0.01, what is the rejection rule?
(c) (2pts) Find the test statistic.
(d) (2pts) Should H0 be rejected?
(e) (2pts) Based on...

A behavioral therapist records the number of children who are
spanked and not spanked by their parents as a form of punishment in
a sample of parents who were spanked by their parents as children.
The following table shows the results of a chi-square
goodness-for-fit test. If we expect to observe equal frequencies,
then compute a chi-square goodness-of-fit test using a .05 level of
significance and decide to retain or reject the null hypothesis.
(This is the entire question as...

A study examined parental influence on teenagers' decisions to
smoke. A group of students who had never smoked were questioned
about their parents' attitudes toward smoking. These students were
questioned again two years later to see if they had started
smoking. The researchers found that, among the 273 students who
indicated that their parents disapproved of kids smoking, 71 had
become established smokers. Among the 35 students who initially
said their parents were lenient about smoking, 15 became smokers.
Do...

An organization surveyed 1000 teens and 1000 parents of teens to
learn about how teens are using social networking sites such as
Facebook and MySpace. The two samples were independently selected
and were chosen in a way that makes it reasonable to regard them as
representative of American teens and parents of American teens.
(a) When asked if they check their online social networking
sites more than 10 times a day, 223 of the teens surveyed said yes.
When parents...

A health psychologist knew that corporate executives in
general have an average score of 80 with a standard deviation of 12
on a stress inventory and that the scores are normally distributed.
In order to learn whether corporate executives who exercise
regularly have lower stress scores, the psychologist measured the
stress of 20 exercising executives and found them to have a mean
score of 72. Is this significant at the .05 level? SD=13.28,
SS=41.22
A) What is the appropriate test...

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