Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
An article in the San Luis Obispo Tribune (September 7, 1999) described an experiment designed to investigate the effect of creatine supplements on the development of muscle fibers. The article states that the researchers "looked at 19 men, all about 25 years of age and similar in weight, lean body mass, and capacity to lift weights. Ten were given creatine-25 grams a day for the first week, followed by 5 grams a day for the rest of the study. The rest were given a fake preparation. No one was told what he was getting. All the men worked out under the guidance of the same trainer. The response variable measured was gain in fat-free mass (in percent)."
a. What extraneous variables are identified in the given statement, and what strategy did the researchers use to deal with them?
b. Do you think it was important that the men participating in the experiment were not told whether they were receiving creatine or the placebo? Explain.
c. This experiment was not conducted in a doubleblind manner. Do you think it would have been a good idea to make this a double-blind experiment? Explain.
What is the expected value of the proportion of those in the sample who are retired?- What is the standard error of the sampling distribution of the proportion, p?
a. Statistics is a numerical fact. b. Descriptive statistics analyzes a specific group. c. Decisions made on the basis of scientific methods are pure guesses.
schadek silkscreen printing inc. purchases plastic cups on which to print logos for sporting events proms birthdays
you have been asked by corporate to analyze some company-wide data from an annual customer satisfaction survey where
You might consider using percentiles, the coefficient of variation, and Tchebysheff's theorem to help describe the data.
According to the Bureau of Labor Statistics (1996), the average price of a gallon of gasoline in all U.S. cities in the United States in January 1996 was $1.129. A later random sample in 24 cities found the mean price to be $1.24 with a standard d..
a. If the Ulleval University Hospital in Oslo requires special treatment for newborn babies weighing less than 2700 g, what is the percentage of newborn babies requiring special treatment?
In an article in the Journal of Advertising, Weinberger and Spotts compare the use of humor in television ads in the United States and the United Kingdom.
find the mean median and mode for the set of scores in the following frequency distribution table. round to 1 decimal
Use a 0.05 significance level to conduct a hypothesis test using the four-step procedure. Be sure to state your conclusion.
At the 0.05 significance level, test the claim that the distribution of crashes conforms to the distribution of ages. Does any age group appear to have a disproportionate number of crashes?
The time required to drive from Detroit to Lansing is an example of a discrete random variable.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd