13:36 1_Final Examination of Statistics.docx . . . 13. The shape of any uniform probability distribution is A. Negatively skewed B. Positively skewed C. Rectangular D. Bell-shaped 14. The upper and lower limits of a uniform probability distribution are A. Positive and negative infinity B. Plus and minus three standard deviations C. 0 and 1 D. The maximum and minimum values of the random variable 15. Which of the following is true in a normal distribution? A. The mean equals zero. B. The mode and the third quartile are equal. C. The mean divides the distribution into two equal areas. D. The area under the curve is 0.68. Part B: Calculations 1. Refer to the following breakdown of responses to a survey of room cleanliness in a hotel. Response Frequency Not Satisfied 20 Satisfied Highly Satisfied 20 (1) What is the class interval for the following frequency table? (2) What is the class with the greatest frequency? (3) What percent of the responses indicated that customers were satisfied? (4) Draw a bar graph that illustrates the preceding frequency table. (5) Draw a bar graph that illustrates the preceding frequency table. (6) Draw a bar graph that illustrates the relative frequencies (7) Draw a pie chart that illustrates the relative frequencies. 2. A company's human resources department was interested in the average number of years that a person works before retiring. The sample of size 11 follows: 12 16 18 19 21 21 21 22 24 24 26 (1) What is the mode? (2) What is the arithmetic mean? (3) What is the median? (4) Based on the values of the arithmetic mean, median, and mode, what is the most likely shape of the distribution? 3. Home Pros sells supplies to "do-it-yourselfers." One of the things the company prides itself on is fast service. It uses a number system and takes customers in the order they arrive at the store. Recently, the assistant manager tracked the time customers spent in the store from the