Question

Children of a certain age in the nation have an average weight
of 86 with a variance of 92.16 lb. A complaint is made that
children are overfed fed in a municipal children's home. As
evidence, a sample of 24 children of the given age is taken from
the children's home with an average weight of 89.65 lb. What can be
concluded with an α of 0.05?

**a)** What is the appropriate test statistic?

---Select one--- (na, z-test, one-sample t-test,
independent-samples t-test, or related-samples t-test)

**b)**

Population:

---Select one--- (children in the nation, children from the
children's home, feeding method, children's home, or weight)

Sample:

---Select one--- (children in the nation, children from the
children's home, feeding method, children's home, or weight)

**c)** Obtain/compute the appropriate values to make a
decision about *H*_{0}.

(Hint: Make sure to write down the null and alternative hypotheses
to help solve the problem.)

critical value = ; test statistic =

Decision: ---Select one--- (Reject H0 or Fail to reject
H0)

**d)** If appropriate, compute the CI. If not
appropriate, input "na" for both spaces below.

[ , ]

**e)** Compute the corresponding effect size(s) and
indicate magnitude(s).

If not appropriate, input and select "na" below.

*d* = ; ---Select one--- (na, trivial effect,
small effect, medium effect, or large effect)

*r*^{2} = ; ---Select one--- (na,
trivial effect, small effect, medium effect, or large effect)

**f)** Make an interpretation based on the
results.

The weight of children in the children's home was significantly higher than the weight of children in the nation.The weight of children in the children's home was significantly lower than the weight of children in the nation. The weight of children in the children's home was not significantly different than the weight of children in the nation.

Answer #1

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Regents are certain about the ineffectiveness of the Orange
Grove Preschool reading program. The average reading comprehension
score is 25 for children of comparative age. The data below are
reading comprehension scores from a sample of children from Orange
Grove Preschool. Scores range from 0 - 40 with higher scores
indicating better reading comprehension. What can be concluded with
α = 0.01?
id
reading
35
36
37
38
39
40
41
42
43
44
45
10
11
12
13
14...

Administrators want to know the effectiveness of the Orange
Grove Elementary reading program. The average reading comprehension
score is 22 for children of comparative age. The data below are
reading comprehension scores from a sample of children from Orange
Grove Elementary. Scores range from 0 - 40 with higher scores
indicating better reading comprehension. What can be concluded with
α = 0.05?
id
reading
35
36
37
38
39
40
41
42
43
44
45
10
11
12
13
14...

Generally, the average typing speed is 56 words per minute (wp).
A professor wanted to see where his students stand compared to the
population. He tested 24 of his students and obtained the following
estimates: an average typing speed of 58 with a variance of 361.00.
What can the professor conclude with α = 0.01?
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test
Related-Samples t-test
Also state population and sample from choices below
Population:...

A developmental psychologist hypothesizes that drinking soda
effects the hyperactivity of children. Children in the experimental
condition were given a can of soda during their afternoon break.
Children in the control condition were not given any soda. The
hyperactivity of the children was measured after the break. Below
are partial SPSS results:
a) Compute the appropriate test statistic(s) to
make a decision about H0.
(Hint: Make sure to write down the null and alternative hypotheses
to help solve the problem.)...

Researchers hypothesize that a new oral contraceptive will
produce weight gain. In a study, healthy females were weighed (lb)
at the beginning of a course of the new oral contraceptive. They
were reweighed at 3 months. What can the researchers conclude with
an α of 0.01? The data are below.
initial weight
3-month weight
140
117
137
130
140
158
147
145
141
140
150
119
144
141
144
163
146
145
151
144
a) What is the appropriate test...

Vita Pills were advertised as having 751 mg of vitamin B3 per
pill. A marketing firm hypothesizes that the amount of vitamin B3
is less than what is advertised. What can be concluded with α =
0.10. The vitamin B3 content per pill from a sample of pills is as
follows:
713, 761, 716, 721, 751, 721, 711, 741.
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test
Related-Samples t-test
b)
Population:
---Select--- sample of...

Dr. Yan predicts that a novel antidepressant drug improves
cognition. To examine this, the drug is administered to a random
sample of 28 trained rats. The rats were then placed in a maze and
timed on how long it took them to complete it. The average
completion time was 48 seconds. Normal rats have an average
completion time of 44 seconds with a variance of 100.00 seconds.
What can be concluded with an α of 0.10? )
What is the...

Application Exercise:
In a fast food company, all male employees with 3 to 5 years of
experience have an average salary of $27900 with a with a standard
deviation of $5090. A random sample of 27 female employees also
having 3 to 5 years of experience had an average salary of $27200.
The company accountant suspects a different in salary practices for
males and females. What can be concluded with an α of
0.10?
a) What is the appropriate test...

A public health official hypothesizes that depression levels in
the nation have been decreasing over the years. In the late 1990s,
the average score on the Birk Depression Inventory (BDI) in the
nation was 17 with a standard deviation of 6.3. A current sample of
17 produces a mean BDI score of 14.4. What can be concluded with α
= 0.10?
a) What is the appropriate test statistic?
na z-test one-sample t-test independent-samples t-test
related-samples t-test
b)
Population:
current sample...

A study was conducted using undergraduates at a rural university
who volunteered to participate in the research as partial
fulfillment of a course requirement. One of the items studied was
the amount of alcohol consumed (in drinks) in any one day for the
past month. Administrators want to know if there are differences in
alcohol consumption between freshmen and juniors. Based on the
information in the table below, what can be concluded with α =
0.05?
freshmen
juniors
1 =...

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