1. State the hypotheses. 2. Compute the difference, x sub d between the before and after observations for each sample 3. What is sample mean?

MATLAB: An Introduction with Applications
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1. State the hypotheses.

2. Compute the difference, x sub d between the before and after observations for each sample

3. What is sample mean?

4. What is the standard deviation?

5. What is the test statistic?

6. Draw the necessary curve.

7. Make a conclusion:

There is a significant difference between before and after
or
There is no significant difference between the before and after.

 

Compute the difference, a between the before and after observations for
each sample.
Subject
1
2
3
Id
Transcribed Image Text:Compute the difference, a between the before and after observations for each sample. Subject 1 2 3 Id
Several recent studies have suggested that people who suffer from
abnormally high blood pressure can benefit from regular exercise. A medical
researcher decides to test her belief that walking briskly for at least half an
hour a day has the effect of lowering blood pressure. She conducts a small
pilot study. If results from it are supportive, she will apply for funding for a
larger study. She randomly samples three of her patients who have high blood
pressure. She measures their systolic blood pressure initially and then again a
month later after they participate in her exercise program. The table shows
the results.
Subject
1
3
Before After
150
130
165
140
135
120
Do a significance testing with a 95% confidence level.
Transcribed Image Text:Several recent studies have suggested that people who suffer from abnormally high blood pressure can benefit from regular exercise. A medical researcher decides to test her belief that walking briskly for at least half an hour a day has the effect of lowering blood pressure. She conducts a small pilot study. If results from it are supportive, she will apply for funding for a larger study. She randomly samples three of her patients who have high blood pressure. She measures their systolic blood pressure initially and then again a month later after they participate in her exercise program. The table shows the results. Subject 1 3 Before After 150 130 165 140 135 120 Do a significance testing with a 95% confidence level.
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