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Suppose you took a sample of 36 Honey Crisp apples and weighed each of them.  The lightest one weighed 140 grams and the heaviest one weighed 194 grams.  If you wanted to create a histogram according to the text and lectures,  each bin/interval  would be ____________ grams wide.

The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the two rear wheels of eight cars and runs the cars until the tires wear out. The data (in kilometers) follow. Analysts wish to determine if the mean difference in wear out time is zero or not.  Set up the appropriate hypothesis test.  How many degrees of freedom will there be?  

Which of the following is not a bar chart?

The following data are the joint temperatures of the O-rings (°F) for each test firing or actual launch of the Space Shuttle rocket motor (from Presidential Commission on the Space Shuttle Challenger Accident, Vol. 1, pp. 129–131): 84, 49, 61, 40, 83, 67, 45, 66, 70, 69, 80, 58, 68, 60, 67, 72, 73, 70, 57, 63, 70, 78, 52, 67, 53, 67, 75, 61, 70, 81, 76, 79, 75, 76, 58, 31. . If you determined the sample standard deviation for this data, what would the units be?

An engineer believes that the number of defects on a product he is working on has the Poisson pmf.  He collects a sample of 25 and notes the number of defects on each product.  The sorted data are 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4.  Perform a Chi-Square Goodness of Fit test on these data.  Take all intermediate computations to four decimal places.  Under the null hypothesis, what is the expected number of products out of the 25 sampled that would have 3 defects?  Answer to two decimal places. 

Match the four V’s of big data to what best describes them.

When the expected inflation rate increases, the real cost of borrowing  [blank] and bond supply  [blank], everything else held constant.

A test of hypothesis on the slope in a simple linear regression application will have the same p-value as a test of hypothesis on the ________________ between the dependent variable (Y) and independent variable (X).  Select the best answer.

The following are reasons why the United States is highly polarized today (contributing factors). Select all that apply. 

Everything else held constant, an increase in the cost of production  [blank] aggregate  [blank].