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The weights of a newborn babies is normally distributed with a mean of 7.5 lbs and a standard deviation of 1.5 lbs.  What is the weight that 97.5% of all babies weigh more than?

The following boxplot, histogram and summary statistics were found using Statcrunch. The data set gives length in inches of men’s legs. Use the graph and statistics to analyze the data set and answer the following questions. e) What is the Name of the Best measure of Spread?

Do the students who sit in the middle have a higher GPA than those who sit in the back? Open the Seating Choice versus GPA (For 3 rows, with Text and Indicator Columns) data in Statcrunch. Link Create and interpret 95% confidence interval for the difference in the GPA’s of those who sit in the middle and those who sit in the back of the class using PANIC.

A country music radio show broadcast in the city of Dayton, Ohio asked people to call in and express their opinions on the new mayor. Are the results likely to be representative of all adults in Dayton? Of all listeners to the radio show? Why or why not? a) What type of Sampling Method was used?

How do the gas prices in Illinois compare to the rest of the country? Open Statcrunch and click “Explore” then “Data”. Find the Data entitled “Gas Prices – U.S. v IL” Link Create and interpret a 95% confidence interval for the difference in the gas prices in the US and Illinois using PANIC

The following boxplot, histogram and summary statistics were found using Statcrunch. The data set gives length in inches of men’s legs. Use the graph and statistics to analyze the data set and answer the following questions. d) What is the Numerical Value of the Best measure of Center?  (do not round)

Data was collected favorite ice cream flavors.  People had to choose from Strawberry, Vanilla or Chocolate.  The results of the survey are as follows. Strawberry Vanilla Chocolate 22 27 35 Test the claim that there are an equal proportion of people who prefer each flavor using a 5% significance level using Phantoms.  

In a 2018 fueleconomy.gov collected data on all 2018 vehicles below is small snapshot of some of that data, it shows summary statistics for the average city MPG’s. Test the claim that General Motors vehicles have a higher average city MPG’s than Ford Motor Company at the 5% significance level using PHANTOMS.   Mfr Name n Mean Std. dev. Ford Motor Company 132 19.075758 4.6783915 General Motors 171 19.859649 5.2168458    

You wish to know which social media platform is most used among the COC students. You cannot ask every student so you decide to take a sample. Explain how you would get your sample using each of the following sampling methods. Also indicate if your method would represent the population and clearly explain why or why not. a) Cluster Sample

You wish to know which social media platform is most used among the COC students. You cannot ask every student so you decide to take a sample. Explain how you would get your sample using each of the following sampling methods. Also indicate if your method would represent the population and clearly explain why or why not. b) Voluntary Response Sample