Statistical Analysis Of Two Population Means Essay

1. Suppose a researcher wants to design a new study with a power of 0.8 and a significance of 0.05 to test whether the caffeine content for a brand of coffee is really 100mg. A previous study gave a mean caffeine level for this brand of 110 mg and a standard deviation of 7 mg. Use PROC POWER to determine how many cups of coffee need testing.

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:

a. For each year, create tables of counts of gender and of nationality. Then create column charts of

Differences related to gender in spatial memory are most widely described and studied of cognitive sex differences. In 1974 Maccoby and Jacklin established that males usually perform better than females in measures of spatial performance, and this discovery has been constantly replicated in multiple studies covering various developmental stages (McGivern et al. 1997; Lewin et al. 2001) and spatial tasks (Dabbs Jr. et al. 1998; Driscoll et al. 2005).

The information in the table below refers to the 2008 model year product line of BMW automobiles. Identify the Individuals, variables, and data corresponding to the variables in the table below. Determine whether each variable is qualitative, continuous, or, discrete. Please refer to problems #51 and #53 on page 13 for examples.

However in regards to general results between both genders it was shown that no definite statistical mean yielded notable results (Alansari & Baroun, 2004). Stroop (1935) also showed that women college students also showed a difference when compared to the men and tended to have higher word reading results, but in regards to the genders showed no significant differentiation between both at the cognitive level.

c. What kind of display would you use to show the association between job class and mode of

Fine dissects the greater male lateralization (GML) hypothesis that males “are more strongly left hemisphere dominant for language processing and right hemisphere dominant for visuospatial processing” (Fine 280). Females, on the other hand, are thought to engage in both hemispheres

We, in turn, will make the course as fun and interesting as possible as we introduce

The experiment done for this study was chosen from the “Perception” section of the Experiment Categories menu of PsychMate. The experiment selected was titled 1.3 Rotation of Mental Images. The experiment Rotation of Mental Images was conducted in the “Normal” mode. The expected Running Time for this experiment was 18 minutes.

1. The researchers analyzed the data they collected as though it were at what level of measurement?

According to the U.S. Census Bureau’s population clock, the population Of the United States as

Differences in brain structure between males and females result in important differences in perceptions, emotional expressions, priorities and behaviors. (*) Relationship traits, problem solving approaches, mathematical abilities, reactions to stress, language, emotions, brain size, pain perception, spatial ability and susceptibility to disorders are just some areas in which men and women react differently because of their differences in brain structure. (*) To some scientists and theorists these many influential biological differences between men and women make gender roles inevitable. (*)

Statistics are used in many different ways in my workplace. The use of statistics is for the improvement of quality care and safety. Statistics are also used to measure employee compliance in regards to hand washing and proper use of policies and procedures. We also use charts and graphs to show infection rates, skin integrity, falls within the facility, budget concerns, and many more. These graphs help hospital personal improve care and safety to provide quality care to all patients. Graphs can also be used to measure patient and employee satisfaction.

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?