Statistics

Using the definitions found in Chapter 1 of Quantitative Analysis, the Internet, and your own personal experiences, make notes on and post one example of each of the following to the class Discussion Board topic “Deterministic and Probabilistic Models”.

ASSIGNMENT Using the definitions found in Chapter 1 of Quantitative Analysis, the Internet, and your own personal experiences, make notes on and post one example of each of the following to the class Discussion Board topic “Deterministic and Probabilistic Models”. A deterministic model ; A probabilistic model ; and A situation in which you could […]

What type of design are you using (between-subjects experimental, within-subjects experimental, quasi-experimental, correlational)?

Choosing the Correct Statistical Test Worksheet Review your chapter readings and the following resources found in Topic 8 Resources: Choosing the Right Statistical Test: Types and Examples and An Introduction to Statistics: Choosing the Correct Statistical Test, then walk through the tree diagram and answer the following questions. What type of hypothesis are you testing […]

Estimate the number of visitors in the sample who actually are looking for the company’s website by giving the mean of the relevant distribution (that is, the expectation of the relevant random variable).

ASSIGNMENT Not all visitors to a certain company’s website are customers or potential customers. In fact, the company’s executives estimate that about 8% of all visitors to the website are looking for other websites. Assume that this estimate is correct and that a random sample of 40 visitors to the website is taken. Answer the […]

What proportion of babies weigh between 10 and 14 pounds? Is it unusual for a baby to weigh more than 17 pounds?

ASSIGNMENT Baby weights: According to a recent National Health Statistics Reports, the weight of male babies less than 2 months old in the United States is normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. What proportion of babies weigh between 10 and 14 pounds? Is it unusual for a baby to weigh […]

How can you control for variables trending linearly over time in your regression model? Estimate a model that controls for linearly trending variables.

Question You are commissioned by the White House to investigate the relationship between consumer prices and approval rates of the President. You are given access to the APPROVAL dataset. The dataset consists of 78 months of data during the presidency of George W. Bush (ending in July 2007, before Bush left office). In addition to […]

Identify the types of variables and measurement scales that were used in the table. Describe the types of descriptive statistics that were used to summarize the findings on your topic.

Assignment Search for a topic related to your professional interests and experience. (If you are a dental MPH track student, try to select a topic related to dentistry or oral health.) The results of this topic search will include an interactive data table, if it is available. Next, interpret these tables, graphs, and the charts […]

Create a cross-tabulation table of toxemia diagnosis for mother and germinal matrix hemorrhage, including the expected frequencies and column percentages.

Assignment Problems not marked with [SPSS] should be done by hand, as problems similar to those could be on the Midterm and/or Final.  (Of course, feel free to check your work using SPSS!) Problems marked with [SPSS] are intended to be done with SPSS.  For these problems, please attach the output file. A study was […]

Identify 4 different types of data you have encountered today or this week. Provide a critique of the data by discussing the population, sample, and any descriptive or inferential information related to the data.

Assignment Data and statistics are shared with us every day. In this course, you have explored data, visualizing data, central tendency, descriptive statistics, and basics of inferential statistics. You reflected about your experience and thoughts about data. Now that you have learned some additional statistics concepts, let’s reflect again. Respond to the following in a […]

What reasons should the assistant chief convey to the fire chief to justify the absence of gender bias in the most recent class of firefighters who were promoted?

ASSIGNMENT You volunteer some of your spare time to your local fire department and have been asked by an assistant chief to analyze data on firefighters who applied for promotion. The assistant chief wants to ensure that gender bias is not a concern in the promotion of firefighters. Shown below is data for 50 firefighters […]

What are the odds of responding “yes” for a female subject who is 60 years old? What is the estimated odds ratio corresponding to the age variable?

Calculate Odds within Logistic Regression Model A survey was conducted and asked: “Do you consider your health to be poor?” This was coded as 1 for “yes” and 0 for “no.” The effect of age (in years) and sex (1 = male, 0 = female) on the outcome was examined using logistic regression. The fitted […]

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