Question
In: Statistics and Probability
An investigator theorizes that people who participate in a regular program of exercise will have levels...
An investigator theorizes that people who participate in a regular program of exercise will have levels of systolic blood pressure that are significantly different from that of people who do not participate in a regular program of exercise. To test this idea the investigator randomly assigns 40 subjects to an exercise program for 10 weeks and 40 subjects to a non-exercise comparison group. After ten weeks the mean systolic blood pressure of subjects in the exercise group is 137 and the standard deviation of blood pressure values in the exercise group is 10. After ten weeks, the mean systolic blood pressure of subjects in the non-exercise group is 127 and the standard deviation on subjects in the non-exercise group is 9.0. Does this experiment provide evidence for the investigator's theory? The obtained statistic: 2.364
a. What type of test should you use?
b. Please provide, in words, the null and alternative hypotheses.
c. Using an alpha level of .01 identify the critical value(s).
d. Using the above test statistic, alpha level and critical value(s) what is your statistical decision?
e. State your conclusion regarding the results from this test in language that a friend of yours with no knowledge of statistics could understand.
Solutions
orchestra answered 1 year agoRelated Solutions
An investigator theorizes that people who participate in a regular program of exercise will have levels...
An investigator theorizes that people who participate in a
regular program of exercise will have levels of systolic blood
pressure that are significantly different from that of people who
do not participate in a regular program of exercise. To test this
idea the investigator randomly assigns 21 subjects to an exercise
program for 10 weeks. After ten weeks the mean systolic blood
pressure of subjects in the exercise group is 137 ( = 10). The mean
systolic blood pressure of...
An investigator theorizes that people who participate in a regular program of exercise will have levels...
An investigator theorizes that people who participate in a
regular program of exercise will have levels of systolic blood
pressure that are significantly different from that of people who
do
not participate in a regular program of exercise. To test this
idea the investiga tor randomly assigns 21 subjects to an exercise
program for 10 weeks and 21 subjects to a nonexercise comparison
group. After ten weeks the mean systolic blood pressure of subjects
in the exercise group is 137...
Imagine you have been selected to participate in an orientation program for international students who are...
Imagine you have been selected to participate in an orientation
program for international students who are coming to Michigan for
the first time. What information do they need to know about life
here, and how can they prepare themselves for the culture shock
they will experience? Consider things like transportation, weather,
entertainment, shopping, use of time, etc.
**Must be at least 200 Words
An investigator wants to determine if a new exercise program aimed at reducing the overall mean...
An investigator wants to determine if a new exercise program
aimed at reducing the overall mean body weight among senior
citizens is more effective than no exercise. A survey of 81
participants in the program finds their average body weight to be
150 lbs with a sample standard deviation of 9 lbs, while 100 senior
citizens with no exercise had a sample bodyweight of 200 lbs with a
sample standard deviation of 10 lbs.
Complete the following to test the...
Why do people of all ages, income levels, and educational backgrounds not participate in political life?...
Why do people of all ages, income levels, and educational
backgrounds not participate in political life? Can anything be done
to engage these people?
A researcher hypothesized that people who exercise regularly are not sick as often as people who...
A researcher hypothesized that people who exercise regularly
are not sick as often as people who don’t exercise regularly. She
randomly selected a group of exercisers and a group of
non-exercisers and recorded the number of sick days they took of
work for one year. The data are recorded
below. Is there support for her hypothesis, α =
.05?
Non-exercisers Exercisers
6 7 3 5
8 12 2
6 9 8
9 4
Test the hypothesis using the 5-step procedure. (22
points)
Calculate the 95% confidence interval. (4 points)
Calculate and...
Data was collected to study the background of the people who participate in online gambling. Data...
Data was collected to study the background of the people who
participate in online gambling. Data was collected to study the
background of the people who participate in online gambling. Data
was collected to study the background of the people who participate
in online gambling. Data was collected to study the background of
the people who participate in online gambling. Data was collected
to study the background of the people who participate in online
gambling. Data was collected to study...
Research indicates that people who volunteer to participate in research studies tend to be natives of...
Research indicates that people who volunteer to
participate in research studies tend to be natives of the general
area more than non-volunteers. To test this phenomenon, a
researcher obtained a sample of 275 Pierce college students. The
students were given a description of a psychological research study
and asked whether they would volunteer to participate. The
researcher also asked where they were from. Use a χ² square to
determine if there is a significant relationship between being
local and volunteering....
Data was collected to study the background of the people who participate in online gambling. 64...
Data was collected to study the background of the people who
participate in online gambling. 64 people were selected at random
and asked about their annual salary and whether they went to
college. After the survey, sample mean and sample standard
deviation were calculated. They were $90K and $30K respectively. A.
Calculate 95% confidence limits for the population mean annual
salary. B. What is the interpretation of the limits in part A? C.
If you calculate 99% confidence limits for...
Scenario 1: A researcher wants to determine if different forms of regular exercise alter HDL levels...
Scenario 1:
A researcher wants to determine if different forms of regular
exercise alter HDL levels in obese middle aged males between the
ages of 35 and 45. Participants in the study are
randomly assigned to one of four exercise groups – No Exercise,
Resistance Training, Aerobic Exercise or Stretching/Yoga – and
instructed to follow the program for 8 weeks. Their HDL
levels are measured after 8 weeks and are summarized below.
Exercise Group
N
Mean
Std Dev
No exercise (TV watching...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Research and describe the following :1. User Stories * What are they used for in the...
- Discuss with your classmates, the impact of Java from a personal, business, and societal perspective. How...
- public class Date { private int dMonth; //variable to store the month private int dDay; //variable...
- Describe the social and cultural conditions that led to the rise of cognitive psychology. Argue whether...
- You must evaluate the purchase of a proposed spectrometer for the R&D department. The base price...
- Sandford Brokers is trying to promote investments in the shares of two stocks, A and B....
- A particular power plant operates with a heat-source reservoir at 350°C and a heat-sink reservoir at...
ADVERTISEMENT