Statistics Exercise 16 Essay

Due to financial hardship, the Nyke shoe company feels they only need to make one size of shoes, regardless of gender or height. They have collected data on gender, shoe size, and height and have asked you to tell them if they can change their business model to include only one size of shoes – regardless of height or gender of the wearer. In no more 5-10 pages (including figures), explain your recommendations, using statistical evidence to support your findings. The data found are below:

8. The researchers state that the sample for their study was 28 women with a diagnosis of OA, and that 18 were randomly assigned to the intervention group and 10 were randomly assigned to the control group. Discuss the study strengths and/or weaknesses in this statement.

·  How were measures of variation used in the study? What conclusions can you draw based on the variation?

1.What two factors did you investigate in your procedure, and why did you choose to compare these two factors?

(1) A study of the number of cars sold looked at the number of cars sold at 500

1. The researchers analyzed the data they collected as though it were at what level of measurement?- The correct answer is Interval/ratio.

4. __B_ A small group is measured for the amount of anxiety they experience in math class (baseline). They are taught a relaxation method and measured again to measure

It sounds like using the stratified random sampling would be a good choice for using a particular group of people.  In stratified random sampling the individuals conducting the research know some things about the community that is providing date such as age, gender, ethnicity, and medical diagnosis. This is also a good option when there is a time restraint to obtain the information that is being gathered.  The survey would also have to be ensured it is written in a way that the average person can clearly understand the question to get a proper answer.

1. Describe the context (why it was done, the general interest and what the researchers wanted to find out) of the research and research question (what is the hypothesis). /10

A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. Using   = .05, what is the value the test statistic?

In contrast, Seligman’s laboratory experiences on dogs, cats, fish, and mice presented significant predictive and construct validity but little evidence of validity and accuracy was detected when the same theory was applied to human participants. In addition, the learned helplessness model of depression has been often criticized for a lack of reproducibility and generalization to a larger population. According to Vollmays and Henn (2010) when researchers examine reproducibility in repeated testing procedures, some animals improve their learning and others show diminished learning because each failure on multiple occasions had caused the uncontrollable stress on the animal thus affecting test reliability. In addition, a study conducted by Gotlib and Colby (1985) found that people who were previously depressed are no different to people who have never been depressed, in terms of looking at negative events without feeling helplessness (Gotlib and Colby, 1985). Thus, suggesting that helplessness could be a symptom rather than an actual cause of depression.

number in order from 1 to 100, the make of the car, the price when new

a. The study was designed as an experimental research by using independent and dependent variables.

Data is presented as mean ± SEM (standard error of the mean). Statistical analysis was

c.)Find a 95% confidence interval for the difference between the above obtained mean starting salaries.