Week 2 Quiz

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University of Phoenix Material Week Two Quiz 1. IN A GALLUP POLL OF 1,038 ADULTS, 540 SAID THAT SECOND-HAND SMOKE IS VERY HARMFUL. WHAT IS THE PERCENTAGE OF ADULTS WHO SAID SECOND-HAND SMOKE IS VERY HARMFUL? Show your work: Answer: 540/1038=0.5202312x100=52.023=52.02%= 52% 2. The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate? Answer: 0.2 is equal to 1/5 or 20%, 0.2 indicates 20% of the data values are in this particular interval. 3. When you add the values 3, 5, 8, 12, and 20 and then divide by the number of values, the result is 9.6. Which term best describes this value: average, mean, median, mode, or standard deviation? Answer: 9.6 is the average of the numbers listed and is also the mean of this data. 4. Answer the next four questions using the following set of numbers. Show your work for all questions: 2.0, 3.7, 4.9, 5.0, 5.7, 6.7, 8.5, 9.0 What is the range of the above values? Range is the difference between the lowest value and the highest value. The range of the listed numbers is 9.0-2.0=7.0. What is the median of the above values? The median is calculated by adding together the two middle numbers and dividing by 2 (2 values). The numbers must be in ascending or descending order. 5.0+5.7=10.7/2=5.35=5.4 is the median of the numbers listed in this question. What is the mean of the above values? To calculate the mean add all of the values in the data together and divide by the number of values. 2.0+3.7+4.9+5.0+5.7+6.7+8.5+9.0=45.5/8=5.6875= 5.7 is the mean of the numbers above. What is the mode of the above values? The mode is the value that occurs most often. There is no mode for the values listed in this question because all of the values only appear one

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