Hollywood studio believes that a movie that is considered a drama will draw a larger crowd on average than a movie that is considered a comedy. To test this theory, he studio randomly selects several movies that are classified as dramas and several movies that are classified as comedies and determines the box office revenue for each movie. The results of the survey are as follows. Assume that the population variances are approximately equal. Box Office Revenues (Millions of Dollars) n Drama 10 160 30 Comedy 15 140 10 Copy Data Calculate a 99 % confidence interval for the difference in mean revenue at the box office for drama and comedy movies. Let dramas be Population 1 and comedies be Population 2. Write your answer using interval notation and round the interval endpoints to two decimal places.

Place the following data in a stem and leaf plot. 137 129 116 114 130 121 124 135 139 132 117 You can draw the stem and leaf plot on paper and then check your answer against the solution. You don't have to put anything in the answer box. A 13

The two-way table given shows the results from a survey of pet owners.   Owns a Dog Does Not Own a Dog Total Owns a Cat 54 21 75 Does Not Own a Cat 81 39 120 Total 135 60 195 Does the data show an association between owning a dog and owning a cat

The total cost for a production process is $ 600 minus two times the number of units produced . The mean and variance of the number of produced are 200 and 20, respectively . So, the mean and variance of the total cost are: A.600 , 200 B.400, 180 C. 200,80 D. 1000, 560

Refer to the following set of data. 42 45 32 27 38 12 32 18 40 22 The difference between the median and the mode is

Sample grade point averages for ten male students and ten female students are listed. Find the coefficient of variation for each of the two data sets. Then compare the results. Males 2.3 3.8 3.9 3.7 2.6 2.4 3.6 3.2 3.9 1.8 Females 2.7 3.6 2.2 3.9 3.7 4.2 1.9 3.9 3.6 2.1 ... The coefficient of variation for males is %. (Round to one decimal place as needed.) The coefficient of variation for females is %. (Round to one decimal place as needed.) Compare the variability of grade point averages of males and females. Choose the correct answer below. O A. The grade point averages of females and males have the same variation. O B. The grade point averages of males are more variable than females. O C. The grade point averages of females and males do not vary. O D. The grade point averages of females are more variable than males.

The total cost for a production process is $600 minus two times the number of units produced. The mean and variance of the number of produced are 200 and 20, respectively. So, the mean and variance of the total cost are a. 400, 180 O b. 600, 200 O c. 200, 80 O d. 1000, 560

This problem is about data. a. What are data?b. How is data type determined?

What is the coefficient of the dummy variable? What is the meaning of the coefficient of the dummy variable?

A record of a chess match records the chess piece used, the location of the piece and the length of time used to make the move. Classify each variable as qualitative or quantitative. A sample data table is listed below Piece Location pawn B3 rook C7 queen A6 0000 Move time (in seconds) 65 84 53 Piece - qualitative; location - quantitative; move time - quantitative Piece - quantitative; location - quantitative; move time - qualitative Piece - qualitative; location - qualitative; move time - quantitative Piece - qualitative; location - quantitative; move time - qualitative