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 following. […]
Category Archives: Statistics
What proportion of babies weigh between 10 and 14 pounds?
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 more […]
What effect would the cost of gas doubling have on cost of ownership? Graph or show hand calculations.
Suppose you want to buy a new car and are trying to choose between two models: Model A: costs $16,500 and its gas mileage is 25 miles per gallon and its insurance is $250 per year. Model B: costs $24,500 and its gas mileage is 40 miles per gallon and its insurance is $450 per […]
Discuss possible confounding variables that could be considered as influencing the response variables within the study.
In your discussion post you must: Define what a confounding variable is and provide a brief description of the study. Discuss possible confounding variables that could be considered as influencing the response variables within the study. Explain how important it is to consider confounding variables when measuring data. Should they be weighed heavily when it […]
How can you control for variables trending linearly over time in your regression model?
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 […]
How or why did you choose the bank(s) you work with?
Week4 Math discussion Topic: Banking For your Main Post, address the following (answer in the form of a paragraph): Do you have a bank account? If so, why? How or why did you choose the bank(s) you work with? Have you ever closed a bank account? Why? What was the process? Why is it important […]
Describe the types of descriptive statistics that were used to summarize the findings on your topic.
What was the topic you selected, and why did you select this topic? Is it a public health concern? (2-3 sentences) Interpret the results of the data analysis for public health research, policy, or practice: Clearly state which data table was used (e.g., mental health, serious psychological distress, ages 18 + US, 1997-2011 [Source: NHIS] […]
What proportion of children have an onset to seizure time between the mean and 50 months?
A study was conducted investigating the long-term prognosis of children who have suffered an acute episode of bacterial meningitis, an inflammation of the membranes enclosing the brain and spinal cord. Listed below are the times to the onset of seizure for 13 children who took part in the study. In months, the measurements are: 0.10 […]
Explain the formula in the text for angle measure in the Cartesian model.
EXERCISES 11.1 Explain the formula in the text for angle measure in the Cartesian model. Find the perpendicular line from (2, 3) to t = {(x, A 1 2x + 3v = 5). Find a coordinate function for f = {(x, A I 2x + 3y = 51. 11.2 THE POINCARE DISK MODEL FOR HYPERBOLIC […]
Identify 4 different types of data you have encountered today or this week.
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 minimum […]
