Question

We use SPSS but I could not figure out that last one

Seasonal affective disorder (SAD) is a type of depression during seasons with less daylight (e.g., winter months). One therapy for SAD is phototherapy, which is increased exposure to light used to improve mood. A researcher tests this therapy by exposing a sample of SAD patients to different intensities of light (low, medium, high) in a light box, either in the morning or at night (these are the times thought to be most effective for light therapy). All participants rated their mood following this therapy on a scale from 1 (poor mood) to 9 (improved mood). The hypothetical results are given in the following table. Light Intensity Low Medium High Time of Day Morning 5 5 7 6 6 8 4 4 6 7 7 9 5 9 5 6 8 8 Night 5 6 9 8 8 7 6 7 6 7 5 8 4 9 7 3 8 6 (a) Complete the F-table and make a decision to retain or reject the null hypothesis for each hypothesis test. (Round your answers to two decimal places. Assume experimentwise alpha equal to 0.05.) Source of Variation SS df MS F Time of day Correct: Your answer is correct. Correct: Your answer is correct. Correct: Your answer is correct. Correct: Your answer is correct. Intensity Correct: Your answer is correct. Correct: Your answer is correct. Correct: Your answer is correct. Correct: Your answer is correct. Time of day × Intensity Correct: Your answer is correct. Correct: Your answer is correct. Correct: Your answer is correct. Correct: Your answer is correct. Error Correct: Your answer is correct. Correct: Your answer is correct. Correct: Your answer is correct. Total Correct: Your answer is correct. Correct: Your answer is correct. State the decision for the main effect of the time of day. Retain the null hypothesis. Reject the null hypothesis. Correct: Your answer is correct.

Answer #1

Seasonal affective disorder (SAD) is a type of depression during
seasons with less daylight (e.g., winter months). One therapy for
SAD is phototherapy, which is increased exposure to light used to
improve mood. A researcher tests this therapy by exposing a sample
of patients with SAD to different intensities of light (low,
medium, high) in a light box, either in the morning or at night
(these are the times thought to be most effective for light
therapy). All participants rated...

Seasonal affective disorder (SAD) is a type of depression during
seasons with less daylight (e.g., winter months). One therapy for
SAD is phototherapy, which is increased exposure to light used to
improve mood. A researcher tests this therapy by exposing a sample
of patients with SAD to different intensities of light (low,
medium, high) in a light box, either in the morning or at night
(these are the times thought to be most effective for light
therapy). All participants rated...

Seasonal affective disorder (SAD) is a type of depression during
seasons with less daylight (e.g., winter months). One therapy for
SAD is phototherapy, which is increased exposure to light used to
improve mood. A researcher tests this therapy by exposing a sample
of patients with SAD to different intensities of light (low,
medium, high) in a light box, either in the morning or at night
(these are the times thought to be most effective for light
therapy). All participants rated...

A researcher measures the relationship between Internet use
(hours per week) and social interaction (hours per week) in a
sample of 10 students. The following table lists the hypothetical
results of this study.
Internet
Use
Social
Interaction
X
Y
7
3
9
6
5
6
8
7
12
4
3
8
2
3
7
6
1
9
12
2
(a) Compute the Pearson correlation coefficient. (Round your
answer to three decimal places.)
(b) Compute the coefficient of determination. (Round your...

Use SPSS to determine if amount of sleep is related to reaction
time.
1. Before computing the correlation, state the null hypothesis
and alternative hypothesis in words (not formulas).
2. Based on the hypotheses you stated, explain whether the
researcher should conduct a one-tailed or two-tailed test.
3. Identify the correlation coefficient (r) for this data set
using SPSS and report it in your answer document.
4. State the degrees of freedom and explain how you calculated
it by hand....

Enter the hypothetical data below in SPSS to use for the
assignment. The SPSS commands: 'file', 'new', 'data' will create a
spreadsheet in which to enter the data below (manually).
Case Group
Test
1
1
6
2
1
7
3
1
5
4
1
4
5
1
1
6
2
3
7
2
5
8
2
2
9
2
5
10
2
1
The groups are coded as follows: 1=experimental group, 2 control
group. The participants in the experimental...

You have been hired to test whether the demand for a product
that your client produces varies between two demographic markets –
the Urban and Rural markets.
As such, in each market, you run a short survey that gauges
customers demand for your product and assigns them to one of three
categories – (i) High (ii) Medium
or (iii) Low.
You survey 70 people in the “Urban” market and find that their
demand falls into the following “buckets”
High
32...

1.
Scientists studying the behavior of spiders have 12 orb spiders
in their lab. Many orb spiders spin a new web each day. Does the
amount of ambient light affect the size of the web? For each
spider, the scientists measured the horizontal diameter (in mm) of
the web spun under bright light conditions one day, and under low
light conditions on a different day.
Here is the data:
spider
1
2
3
4
5
6
7
8
9
10...

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