Question

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 statistic?

---Select--- na z-test ,One-Sample t-test, Independent-Samples
t-test ,Related-Samples t-test

**b)**

Condition 1:

---Select--- beginning new oral contraceptive weight 3 months
healthy females

Condition 2:

---Select--- beginning new oral contraceptive weight 3 months
healthy females

**c)** Compute the appropriate test statistic(s) 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--- Reject H0 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/or select "na" below.

*d* = ; ---Select--- na trivial
effect small effect medium effect large effect

*r*^{2} = ; ---Select--- na
trivial effect small effect medium effect large effect

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

A. There was a significant weight decreases in women using the new oral contraceptive.B. There was a significant weight increase in women using the new oral contraceptive. C.There was no significant weight change in women using the new oral contraceptive.

please use 4 numbers after the decimal and please use answer choices provided.

Answer #1

Researchers hypothesize that a new oral contraceptive will
produce weight loss. In a study, healthy females were weighed (lb)
at the beginning of a course of the new oral contraceptive. They
were reweighed at 2 months. What can the researchers conclude with
an α of 0.01? The data are below.
initial weight
2-month weight
140
141
137
130
140
158
147
145
148
140
150
119
144
141
144
163
146
145
151
144
a) What is the appropriate test...

A doctor hypothesizes that females have higher systolic blood
pressure than males. The doctor obtains the blood pressure from a
sample of patients during their annual check-up. Below is the
systolic blood pressure for the sample. What can be concluded with
α = 0.05?
male
female
106
119
98
105
100
132
109
113
98
105
137
105
119
115
127
122
131
124
111
136
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test...

For each of the following sets of results, compute the
appropriate test statistic, test the indicated alternative
hypothesis, and compute the effects size(s) indicating their
magnitude:
set
hypothesis
1
2
D
n
α
a)
μ1 ≠ μ2
32.7
38
4.5
24
0.10
b)
μ1 > μ2
101.3
96
9.6
26
0.01
c)
μ1 < μ2
75.2
75.4
6.8
24
0.05
a)
Compute the appropriate test statistic(s) to make a decision about
H0.
critical value = ; test statistic =
Decision: ---Select--- Reject...

Boys of a certain age in the nation have an average weight of 86
with a standard deviation of 9.6 lb. A complaint is made that boys
are overfed in a municipal children's home. As evidence, a sample
of 29 boys of the given age is taken from the children's home with
an average weight of 85.14 lb. What can be concluded with α =
0.01?
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test...

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,...

Application Exercise:
A physician hypothesizes that males have higher systolic blood
pressure than females. The physician obtains a sample of patients
and measures their blood pressures during their regular check-up.
Below is the systolic blood pressure for the sample. What can the
physician conclude with α = 0.01?
male
female
106
119
98
105
100
132
109
113
98
105
137
115
119
115
127
122
131
124
111
136
a) What is the appropriate test statistic?
---Select--- na z-test...

A school psychologist wants to know if a popular new hypnosis
technique impacts depression. The psychologist collects a sample of
14 students and gives them the hypnosis once a week for two months.
Afterwards the students fill out a depression inventory in which
their average score was 43.04. Normal individuals in the population
have a depression inventory average of 49 with a variance of
144.00. What can the psychologist conclude with an α of 0.01?
a) What is the appropriate...

An experiment was conducted to see the effectiveness of two
antidotes to three different doses of a toxin. The antidote was
given to a different sample of participants five minutes after the
toxin. Twenty-five minutes later the response was measured as the
concentration in the blood. What can the researchers conclude with
α = 0.01?
Dose
Antidote
5
10
15
1
0.6
1.1
1.1
2.1
1.5
6.2
3.1
4.1
5.9
2
1.1
1.2
1.1
1.7
1.3
1.5
2.1
3.1
2.1...

A school psychologist believes that a popular new hypnosis
technique increases depression. The psychologist collects a sample
of 23 students and gives them the hypnosis once a week for two
months. Afterwards the students fill out a depression inventory in
which their average score was 49.21. Normal individuals in the
population have a depression inventory average of 49 with a
variance of 121.00. What can the psychologist conclude with an α of
0.01?
a) What is the appropriate test statistic?...

A sociologist wants to know about the stress levels in the
nation over the past years. In the late 1990s, the average score on
the Brown's Stress Inventory (BSI) in the nation was 18 with a
variance of 51.84. A current day sample of 21 produces a mean BSI
score of 18.5. What can the sociologist concludes with an α of
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
b)
Population:...

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