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a) A political pollster reports that his candidate has a 10% lead in the polls with 10% undecided. Observation as he is only guessing as to the conclusion that will overcome the final analysis. Observation is the presence of observing only where the experimental is adding to or taking from. 5) Select the study that is most appropriate and EXPLAIN WHY it is most appropriate for the study. a) Is the aspirin produced by a particular pharmaceutical company better than that of a competitor at relieving headaches? Which of the following would best be used to study this: 1) a case-controlled observation; 2) an observation; 3) a double-blind experimental procedure; and 4) and experimental procedure. Using the double-blind experimental procedure would be the likely use as this would keep any and all researches out of the equation so the test would be completed without bias.
From Chapter One
1) Focus on Public Health—On page 44 of the text, it discusses the Harvard Nurses’ Health Study, which is a very well-known study that has been conducted for a number of years. Answer discussion question two at the end of the article. The researchers are observing the results of about 120 nurses over a time frame of their lives. This is a way of observing them without any interference from the researchers. If the experimental part was done the same way then it might but not likely to be as accurate as the observation. There is a chance that the length of time from year to year may have some difficulties in the study if it was an experiment. Chapter Two 1) Identify the following variables as either qualitative or quantitative and EXPLAIN your answers. a. The number of people on a jury. This would be quantitative as it is something that can be measured. People on a jury will consist of 12 as always the count is the same. b. The color of your house Qualitative as there is no measurements involved. The color of a house cannot be counted. 2) Identify the number as either continuous or discrete and EXPLAIN your answers. a. The average height of all freshmen entering college in a certain year is 68.4 inches. Discreet as it can change from one instance to another. There is also a .4 involved in the description as well. b. The number of limbs on a 2-year-old oak tree is 21. Continuous as there is ever changing in the environment and will increase over the years. 3) Determine which of the four levels of measurement is most appropriate and explain your answer. a. Temperatures in degrees Fahrenheit of the ocean at various depths. Ordinal level of measurement. It can be arranged from low to high. b. The rank of individuals in the military Nominal level of measurement. It consist of the category of a person in the military. c. The number of people with blue, brown and red hair in a classroom The ratio of measurement. There is only a zero percentage of data that is considered required. 4) Determine the following (show your work): a. The speed of a new microprocessor is 800MHZ, but a new test of its speed gives a measurement of 820MHZ. What is the absolute error? What is the relative error? 800MHZ – 820MHZ b. Convert 1/16 to a percent That would be 6.25 percent. …show more content…
(Just divide 100 by 16)
c. Convert 0.45 to a percent Percentage: Move the decimal two places to the right..... 45%
Fraction: Put 45% over 100 and reduce it to its lower terms...... 9/20 d. Humanities majors spend an average of $115 per course on books. Mathematics majors spend an average of $70 per course on books. What is the percent difference between the two amounts relative to the amount for mathematics majors (round to the nearest percent)? The required percentage = ((115- 70)*100)/70 % = 64.29% e. Suppose that the cost of a statistics text was $50 in 1985 and is $100 in 2000. What is the “Statistics Text Index” number, rounded to the nearest tenth, for the 2000 edition with the 1985 price as the reference value? (100/50) x100 = 200%
From Chapter Two
2) Focus on Economics—On page 76 and 77, the article looks at an important issue to everyone—the economy. In particular it is focusing on whether our standard of living is improving. Answer discussion question one at the back of the article. The graph shows Diet COLA which to me
From Chapter One
1) Focus on Public Health—On page 44 of the text, it discusses the Harvard Nurses’ Health Study, which is a very well-known study that has been conducted for a number of years. Answer discussion question two at the end of the article. The researchers are observing the results of about 120 nurses over a time frame of their lives. This is a way of observing them without any interference from the researchers. If the experimental part was done the same way then it might but not likely to be as accurate as the observation. There is a chance that the length of time from year to year may have some difficulties in the study if it was an experiment. Chapter Two 1) Identify the following variables as either qualitative or quantitative and EXPLAIN your answers. a. The number of people on a jury. This would be quantitative as it is something that can be measured. People on a jury will consist of 12 as always the count is the same. b. The color of your house Qualitative as there is no measurements involved. The color of a house cannot be counted. 2) Identify the number as either continuous or discrete and EXPLAIN your answers. a. The average height of all freshmen entering college in a certain year is 68.4 inches. Discreet as it can change from one instance to another. There is also a .4 involved in the description as well. b. The number of limbs on a 2-year-old oak tree is 21. Continuous as there is ever changing in the environment and will increase over the years. 3) Determine which of the four levels of measurement is most appropriate and explain your answer. a. Temperatures in degrees Fahrenheit of the ocean at various depths. Ordinal level of measurement. It can be arranged from low to high. b. The rank of individuals in the military Nominal level of measurement. It consist of the category of a person in the military. c. The number of people with blue, brown and red hair in a classroom The ratio of measurement. There is only a zero percentage of data that is considered required. 4) Determine the following (show your work): a. The speed of a new microprocessor is 800MHZ, but a new test of its speed gives a measurement of 820MHZ. What is the absolute error? What is the relative error? 800MHZ – 820MHZ b. Convert 1/16 to a percent That would be 6.25 percent. …show more content…
(Just divide 100 by 16)
c. Convert 0.45 to a percent Percentage: Move the decimal two places to the right..... 45%
Fraction: Put 45% over 100 and reduce it to its lower terms...... 9/20 d. Humanities majors spend an average of $115 per course on books. Mathematics majors spend an average of $70 per course on books. What is the percent difference between the two amounts relative to the amount for mathematics majors (round to the nearest percent)? The required percentage = ((115- 70)*100)/70 % = 64.29% e. Suppose that the cost of a statistics text was $50 in 1985 and is $100 in 2000. What is the “Statistics Text Index” number, rounded to the nearest tenth, for the 2000 edition with the 1985 price as the reference value? (100/50) x100 = 200%
From Chapter Two
2) Focus on Economics—On page 76 and 77, the article looks at an important issue to everyone—the economy. In particular it is focusing on whether our standard of living is improving. Answer discussion question one at the back of the article. The graph shows Diet COLA which to me