Directions: For each of the following, identify the method used to collect the data (census, systematic, convenience, voluntary response, cluster, stratified, or simple random). Explain why you chose your answer and if the method will represent the population of interest or not? 1. The admissions department at a college wants to see how many … Read more
Practice Problems Section 1C 1. Define each of the following and give an example of each. a) Population f) Response Bias b) Census g) Sampling Bias c) Sample h) Deliberate Bias d) Bias i) Non-response Bias e) Question Bias Directions for #2-10: For each of the following scenarios, describe the population of interest and all … Read more
Determine if the following data is categorical or quantitative and explain why. 1. The types of cars in the different parking lots. 2. The average number of hours spent practicing ping-pong. 3. Areas in North Dakota that have wild mustangs. 4. Each person is asked if he or she wear glasses, contacts, neither, or … Read more
Week 8 Assignment – Case Study: Statistical Inference Overview The research department of an appliance manufacturing firm has developed a solid-state switch for its blender that the research department claims will reduce appliance returns under the one-year full warranty by 3%6%. To determine if the claim can be supported, the testing department selects a … Read more
Hypothesis Testing The Lazer Company has a contract to produce a part for Boeing Corporation that must have an average diameter of 6 inches and a standard deviation of 0.10 inch. The Lazer Company has developed a process that will meet the specifications with respect to the standard deviation, but it is still trying … Read more
Question one The Kenyan cabinet secretary for agriculture asserted that the locusts in Kenya have an average length of 41mm and hence they will die soon because 41 mm is classified as longer and old wings. With the probability that the average wing length will fall between two values being 99%. Determine the two mean … Read more
For any distribution, there are an equal number of values above and below the mean. Do you agree? Coefficient of variation CV = SD /mean *100 = 10/40*100 = 25% Range by use of Thumb Range Rule = 4*SD =4*10=40Can you explain these numbers? What do they mean? According to the Empirical rule, about … Read more
This concept has been a difficult one for me to grasp but this is my take on the subject. I currently work on a post orthopedic surgery/trauma unit. On our unit, it is very important that all patients get out of bed at least once on the day of surgery (activity level allowing). According to … Read more
For this summers project we are going to use data from the General Social Survey (GSS). The GSS is a sociological survey created and regularly collected since 1972 by the National Opinion Research Center at the University of Chicago. It is funded by the National Science Foundation. The GSS collects information and keeps a historical … Read more
Describe the following terms in your own words: Mean Standard Deviation Z Scores Correlation Finally, if someone told you that the average of a data set was 40, and that standard deviation was 10, what else could you derive from that information. 100 words minimum