The dog food company claims that the mean weight of a bag of food is 30 pounds.  A sample of 36 bags of food found the sample mean to be 29.6 pounds with a standard deviation of 0.5 pounds. We want to test if the dog food bags actually weigh less than 30 pounds. Conduct a hypothesis test at the 0.05 significance level. (a) State the null and alternative hypothesis on your scratch paper. (b) Using your calculator find the test statistic. Round to 1 decimal places. [teststat] (c) State the p-value. [c] enter exactly what your calc outputs.  (d) Do you reject the null hypothesis or fail to reject the null hypothesis? [d]      Why? State on your scratch paper.  (e) Interpret your decision. State on your scratch paper.   

The length of planarian flatworms found on the riverbanks of the Ohio River follows a uniform distribution that ranges between 12 and 23 millimeters. (a) What is the probability the length was greater than 20 millimeters? [1] (b) Sketch a graph of this distribution on your scratch paper. Did you do this? [yes] (c) State the mean. [mean] (d) Find the . [prob]  

7 people were surveyed. The following chart represents the number of books read and candy bars consumed by each person during the spring semester.  Number of books read Candy bars consumed 3 9 5 1 2 7 3 6 4 5 5 4 1 10 (a) Sketch a scatterplot on your scratch paper. A rough sketch is fine, showing the basic shape. Did you do this? [check] (b) Calculate the best fit line. Round to two decimal places.

40% of workers have taken their vacation time by July. Suppose 75 workers are selected at random. Show your calculator steps on parts b and c on your scratch paper. (a) What is the expected number of workers that have taken their vacation time by July? [mean] (b) Find the probability that exactly 28 workers have taken their vacation time by July. Round to three decimal places. [28] (c) Find the probability that at most 35 workers have taken their vacation time by July. Round to three decimal places. [35]  

The headline, “The surprising reason this teacher no longer encourages her students” is an example of which of the following?

During the Boston marathon bombings, users on the Internet misidentified a man, Sunil Tripathi, as one of the perpetrators of the bombing. A Buzzfeed journalist retweeted this information on his twitter handle. Which of the following concepts are at work here?

Answer the following based on a normal distribution with a

A record label may give cash, gifts, or other secret payments to radio DJs or programmers in exchange for more airtime for the label’s artist. What’s the concept?

As discussed in class and in the textbook, how many major recording labels are there?

Based on boyd and Ellison’s criteria, email can be considered a social networking site.