Assume that 18 subjects received one of three treatments and produced the data reported in Data Set B.
Assume that 18 subjects received one of three treatments and produced the data reported in Data Set B. Conduct a one-way ANOVA to see if the means of the three treatments are different on a statistically significant level. Complete an ANOVA table reporting the relevant SS, df, MS, and Fs. Also remember to include your critical value and whether you would reject your null hypothesis.
1. a. Assume that Data Set A depicts the scores
of 10 subjects who received either Treatment 1 or
Treatment 2. Calculate a t-test for independent means to
determine whether the means are significantly different from each
other. In your complete answer, remember to include your
t-statistic, critical value, and your decision about whether to
reject the null hypothesis. For this question, you should assume
that different participants received the two different
treatments.
b. Now assume that Data Set A...
1. Now assume that Data Set A depicts the scores of five
subjects who received both Treatment 1 and Treatment 2. Calculate a
t-test for dependent means to determine whether the means for the
two treatments were significantly different. The correlation
between the two treatments is +1.00. In your complete answer,
remember to include your t-statistic, critical value, and your
decision about whether to reject the null hypothesis. For this
question, you should assume that the same participants received
each...
Assume that Data Set A depicts the scores of 10 subjects who received either Treatment 1 or Treatment 2. Calculate a t-test for independent means to determine whether the means are significantly different from each other. In your complete answer, remember to include your t-statistic, critical value, and your decision about whether to reject the null hypothesis. For this question, you should assume that different participants received the two different treatments.
Data Set A
Treatment 1
Treatment 2
45...
In certain drug trial, 10 subjects who received a placebo
reported headaches, while 30 subjects who received a placebo
reported no headaches. Of the subjects taking a new drug, 20
reported headaches, while 30 did not. a) Display this information
in a contingency table, including all totals. b) What percentage of
participants in the trial reported headaches? c) What percentage of
new-drug takers reported headaches? d) What percentage of placebo
takers reported headaches?
a) Draw a diagram to show a...
In R, Use the anorexia data set for questions 8-15
Recall there are three distinct treatments. You may be
suspicious that there is a significant difference in the mean
weights assigned to the different treatments. It is not a good
experimental design if one of the treatments has subjects who are
starting in a better position than the subjects of other
treatments. To test if this is a well-designed experiment we
perform an ANOVA analysis .The null hypothesis is the...
A one-way within-subjects ANOVA was carried out on a set of data
with 4 groups of 6 subjects each. The responses are presented in
the following table:
Subject
A1
A2
A3
A4
S1
5
6
10
9
S2
6
6
11
9
S3
7
7
8
7
S4
6
8
11
8
S5
4
6
10
8
S6
6
5
7
7
Complete the ANOVA table (show the work as well)
Source
SS
df
MS
F
Factor A
__
__...
Data set for ages of students in stats class:
17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,19,
20, 20, 20, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
24, 25, 25, 25, 26, 26, 27, 28, 28, 28, 28, 29, 29, 32, 36, 42
1) Find the standard deviation of the ages and use it to
calculate a 95% confidence interval for the true mean age (be...
Data set for ages of students in stats class:
17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,19,
20, 20, 20, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
24, 25, 25, 25, 26, 26, 27, 28, 28, 28, 28, 29, 29, 32, 36, 42
1) Suppose we are trying to use this sample to infer something
about the ages of all PSU students. Explain why this is...
a) TRUE OR FALSE: For a set of data with a mean of 18 and a
variance of 25, approximately 68% of the values will fall between
13 to 23.
b) Which of the following statement is true about the
relationship between a sample and a population
1)Every sample is a perfect representation of a population
2)The sample size is smaller than a population size
3)Every member of a population is also in the sample
4)A population size is smaller...