In a study of television ratings, groups of six U.S. households are randomly selected. In the table below, the random variable x represents the number of households among 6 that were tuned in to watch the 2018 television premiere of The Walking Dead. Is two a significantly high number of the selected households to be tuned to watch the premiere? Why or why not?

Billy Joe’s Ice Cream store is interested how the weather affects their ice cream sales. The following table represents data from randomly selected spring, summer, and fall months over a few years. The number of days in the month with no cloud cover and the numbers of ice cream cones sold for that month were recorded. Determine if there is a linear correlation between the number of days with no cloud cover and the number of ice cream cones sold. Statistical Method:  Is there significant linear correlation?  Yes or No?   Using the data above, find the regression line, and preict the number of cones sold when a month has 13 days with no cloud cover. Regression Line:  Number of cones sold: 

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Heights of Chihuahuas in a certain are normally distributed with a mean of 7.5 inches and a standard deviation 1.5 inches. If a group of 12 Chihuahuas is selected, find the probability that their mean height is shorter than 7 inches. Statistical Method:  Conclusion: 

A new coach claims that 30% of basketball players are left handed.  Out of a sample of 73 basketball players, 15 are left handed.  Use a 0.05 significance level to test the coach’s claim. Statistical Method:  Conclusion: 

The following table contains data from a study of voters in two major California cities a. If one of the voters is randomly selected, find the probability that the voter is a democrat.  b. If one of the voters is randomly selected, find the probability that the voter selected was from Fresno or a republican.  c. If one of the voters is randomly selected, find the probability that the voter was a democrat, given that the voter was from San Francisco.  d. If two voters are randomly selected, find the probability that they are both democrats. 

You may use the following Stats Packet document on Exam 2 for reference: Stats Formulas Calculations Guide (with tables)-1.pdf

Use the following data to create a stemplot. The midterm test scores for a typing class are listed below: 85    77    93    91    74    65    68    97    88    59    74    83    85    72    63    79 

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