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Miller Motte Technical College *

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HCI1700

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Statistics

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Jan 9, 2024

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pdf

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We discovered in Chapter 10 that descriptive statistics describe data in ways that are manageable and more easily understood. They describe a population, they summarize data and help us describe using the concepts of rank, quartile, decile, percentile, central tendency, and measures of variation. Using your textbook (and the Internet if needed), answer the following questions. 1. Fourteen patients have the following LOS: 2, 6, 6, 4, 7, 18, 5, 5, 3, 8, 6, 7, 9, and 4. Compute the mean, median, and mode. Round the mean to two decimal places. Mean = 6.36 Mode= 6 Median=6 2. The quality manager at Community Physician’s Clinic is investigating a complaint that the wait times are too long at the clinic. She wishes to use the median to determine the wait times. Round the mean to one decimal place. Calculate the median and mean of the wait times: (In minutes): 12, 17, 11, 10, 9, 22, 18, 20, 8, 7, 6, 12, 12, 13. mean= 12.1 median=12 3. A pediatrician at the Community Physicians Clinic told a mother that her six-month-old child is in the 54th percentile in weight. This means that her child’s weight is less than or equal to 54% of all six-month-old children. True or false? If false, explain why. True. If a pediatrician tells a mother that her six-month-old child is in the 54th percentile in weight, it means that her child's weight is less than or equal to 54% of all six-month-old children. The percentile indicates the relative position of a child's weight compared to a reference population. Using the information below for University Hospital, answer questions 3-4. University Hospital C-sections by Physician January–December, 20XX

Physician Number Number of C-sections 101 3 202 7 303 27 305 33 401 5 407 8 508 1 518 12 629 9 710 2 911 4 912 18 933 22 944 15 975 20

3. Which percentile is Dr. 975? 4. Find the 60th percentile. 106 5. The range in a frequency distribution is 20. If the lowest value is 2, what is the highest value? 22 6. The range in a frequency distribution is 45. If the highest value is 109, what is the lowest value? 64 7. A group of women seen at a diabetes clinic weighed 140, 125, 210, 245, 202, 199, 173, and 197 pounds. What is the range? 120 8. When two variables are correlated, it means that one is the cause of the other. True or false? If false, explain why. False. When two variables are correlated, it means that there is a relationship or association between the variables. However, correlation does not imply causation. 9. Dr. Anderson, a new pediatrician at Community Physician’s Clinic, wants to study this new patient’s growth charts to determine if they are within the guidelines for weight for age. His last ten six-month-old male infants showed weights of 13.2, 14.6, 15.8, 16.5, 18.5, 12.1, 15.4, 16.1, 18.0, 13.2. Dr. Anderson wants to follow the guidelines that recommend a 6-month-old infant should weigh 16.5 pounds. What percentile is the 12.1lbs infant in? 0th percentile 10. When a distribution is skewed to the right, this means there is a longer tail. 11. Indicate whether a table or a graph is the preferred method of presentation in the following situations: a. Distribution by site, sex, race, and time period of all cancers in your healthcare facility b. Survival trends over time by sex for lung cancer a. For the distribution by site, sex, race, and time period of all cancers in your healthcare facility, a table would be the preferred method of presentation. It allows for a comprehensive and organized display of the data, making it easier to compare and analyze different variables. b. For survival trends over time by sex for lung cancer, a graph would be the preferred method of presentation. A line graph, for example, can visually represent the trends and changes in survival rates over time, making it easier to understand and interpret the data.

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