Concept explainers
In the 2004 Tour de France, Lance Armstrong made history by winning the race for an unprecedented sixth time. In 2005, he became the only 7-time winner and set a new record for the fastest average speed—41.65 kilometers per hour—that stands to this day. In 2012, he was banned for life for doping offenses, stripped of all of his titles and his records expunged. You can find data on all the Tour de France races in the data set Tour de France 2016. Here are the first three and last seven lines of the data set. Keep in mind that the entire data set has over 100 entries.
2. Classify each variable as categorical or quantitative; if quantitative, identify the units.
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Chapter 1 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
- After dieting for 30 days, Ignacio has lost 18 pounds. What number describes his average weight change per day?arrow_forwardDescribe how you have used two topics from this chapter in your life outside of your math class during the past month.arrow_forwardhe Environmental Protection Agency (EPA) uses a measure called the Pollutant Standards Index (PSI) to measure air quality in a city. A PSI reading over 100 indicates a day when the air quality is considered unhealthy. The measurements represent the number of days in 1995 that the PSI was over 100 for twenty metropolitan areas in the U.S. Midwest.0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 3, 4, 4, 4, 4, 5, 7, 7, 11, 14A careless employee originally recorded a number that was at least 20 times larger than 14:0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 3, 4, 4, 4, 4, 5, 7, 7, 11, (much larger than 14)The employee's mistake would have the following effect:The median would stay the sameincrease decrease The mean would decreaseincrease stay the same The mode would increasestay the same decrease The IQR would increasedecrease stay the same The standard deviation would decreaseincrease stay the samearrow_forward
- a vehicle travelled 20 kilometers in 15 minutes. what is the average speed of the vehicle.arrow_forwardThe Environmental Protection Agency (EPA) uses a measure called the Pollutant Standards Index (PSI) to measure air quality in a city. A PSI reading over 100 indicates a day when the air quality is considered unhealthy. The measurements represent the number of days in 1995 that the PSI was over 100 for twenty metropolitan areas in the U.S. Midwest. 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 3, 4, 4, 4, 4, 5, 7, 7, 11, 14 Which of the above is the appropriate boxplot for this data?AB C When we drew the boxplot for this data we found no extreme outliers:truefalsearrow_forwardOne athlete won a 100-meter race with a time of 11.16 seconds. Another athlete won a previous 100-meter race in 12.0 seconds. If they ran in the same race repeating their respective times, by how many meters would the faster athlete win?arrow_forward
- If a person ran a 26.2 mile race in 2 hours and 15.4167 minutes, how fast was she going in mph?arrow_forwardDid anyone have an iq of 115?arrow_forwardTed Williams played for the Boston Red Sox from 1939-1960. Many people credit him with being the greatest hitter of all time. Unfortunately, his career totals are somewhat less impressive than others because his career was interrupted from 1943-1945 by World War II and from 1952-1953 by the Korean War. Some assert that if he had been playing during the war years, he would have broken Hank Aaron’s home run record of 755 and runs batted in (RBI) record of 2297. Below are Williams’ statistics. Year Number of home runs Number of RBIs 1939 31 145 1940 23 113 1941 37 120 1942 36 137 1943 0* 0* 1944 0* 0* 1945 0* 0* 1946 38 123 1947 32 114 1948 25 127 1949 43 159 1950 28 97 1951 30 126 1952 1* 3* 1953 13* 34* 1954 29 89 1955 28 83 1956 24 82 1957 38 87 1958 26 85 1959 10 43 1960 29 72 a.Excluding the…arrow_forward
- Martha is in a statistics course in which each exam has a total of 100 points possible. Martha currently has an average score of 88 on her statistics exams. If she earns a score of 95 on her final exam, Martha's averagearrow_forwardA cyclist covers his first five km. at an average speed of 10 km. p.h., another km. at 8 km. p.h. and the last two km. at 5 km. p.h. Find average speed of the entire journey and verify your answer.arrow_forwardThe Bureau of Labor Statistics keeps track of occupational injuries in various categories. In a recent year, there were 4600 fatal injuries among wage and salary workers, but only 1044 fatal injuries among self-employed workers. Does this mean that the risk of an injury-causing death is greater for wage and salary workers than self-employed? 1A - Yes -No - Can't say. 1B. Explain your choicearrow_forward
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