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Question 1

Find the (a) mean, (b) median, (c) mode, and (d) midrange for the given sample data. An experiment was conducted to determine whether a deficiency of carbon dioxide in the soil affects the phenotype of peas. Listed below are the phenotype codes where 1 = smooth-yellow, 2 = smooth-green, 3 = wrinkled-yellow, and 4 = wrinkled-green. Do the results make sense? 4 1 4 2 3 3 3 4 3 3 1 4 3 (a) The mean phenotype code is 2.8 (Round to the nearest tenth as needed.) (b) The median phenotype code is 3. (Type an integer or a decimal.) (c) Select the correct choice below and fill in any answer boxes within your choice NextDetermine whether the study is an experiment or an observational study, and then identify a major problem with the study. K The Physicians' Health Study involved 22,071 male physicians. Based on random selections, 11,037 of them were treated with aspirin and the other 11,034 were given placebos. The study was stopped early because it became clear that aspirin reduced the risk of myocardial infarctions by a substantial amount. This is an observational study | because the researchers apply a treatment to the individuals. What is a major problem with the study? O A. The results apply only to individuals with heart disease. O B. There is no blinding or replication, which has a high chance of leading to bias. O C. The results apply only to male physicians. O D. This is a convenience sample with voluntary response, which has a high chance of leading to bias. Next Player/Player.aspx?cultureld=&theme=math&style=highered&disableStandbyindicator=true&assignmentHandlesLocale=true#Vbelow are the annual tuition amounts of the 10 most ex ngulaon of all of that country's college tuitions? pensive colleges in a country for a recent year. What does this "Top 10" list tell us about the 553945 $54,186 $52,618 8553.878 $52,618 I: $50,539 $51,099 $51,614 $50,510 $51,685 Find the mean, midrange, median. and mode of the data set. The mean of the data set is $. (Round to two decimal places as needed) 7 The midrange of the data set is $ (Round to two decimal places as needed.) The median of the data set is 31. The brain volumes (cm ) of 20 brains have a mean of 1178.9 cm and a standard deviation of 122.7 cm . Use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or significantly high. For such data, would a brain volume of 1474.3 cm be significantly high? Significantly low values are |cm or lower. (Type an integer or a decimal. Do not round.) Significantly high values are | cm or higher. (Type an integer or a decimal. Do not round.) Is 1474.3 cm significantly high? O A. No, because it is between the limits separating values. NextIn a study of all babies born at hospitals in one state, it was found that the average (mean) weight at birth was 3137.9 grams. Identify whether this value is a statistic or a parameter. Choose the correct answer below. O A. The value is a parameter because it describes some characteristic of a sample. O B. The value is a statistic because it describes some characteristic of a sample. O C. The value is a statistic because it describes some characteristic of a population. O D. The value is a parameter because it describes some characteristic of a population. NextFind the (a) mean, (b) median, (c) mode, and (d) midrange for the given sample data. An experiment was conducted to determine whether a deficiency of carbon dioxide in the soil affects the phenotype of peas. Listed below are the phenotype codes where 1 = smooth-yellow, 2 = smooth-green, 3 = wrinkled-yellow, and 4 = wrinkled-green. Do the results make sense? 4 1 4 1 2 3 3 3 4 3 3 1 4 3 (c) Select the correct choice below and fill in any answer boxes within your choice. O A. The mode phenotype code is 3 (Use a comma to separate answers as needed.) O B. There is no mode. (d) The midrange of the phenotype codes is 8 (Tvbe an integer or a decimal.) NextAmong fatal plane crashes that occurred during the past 55 years, 130 were due to pilot error, 51 were due to other human error, 522 were due to weather, K 250 were due to mechanical problems, and 595 were due to sabotage. Construct the relative frequency distribution. What is the most serious threat to aviation safety, and can anything be done about it? (Round to one decimal place as needed.) What is the most serious threat to aviation safety, and can anything be done about it? O A. Weather is the most serious threat to aviation safety. Weather monitoring systems could be improved. O B. Pilot error is the most serious threat to aviation safety. Pilots could be better trained. O C. Mechanical problems are the most serious threat to aviation safety. New planes could be better engineered. O D. Sabotage is the most serious threat to aviation safety. Airport security could be increased. NextListed below are the annual tuition amounts of the 10 most expensive colleges in a country for a recent year. What does this "Top 10" list tell us about the population of all of that country's college tuitions? $53,945 $54,186 $52,618 $53,878 $52,618 $50,539 $51,099 $51,614 $50,510 $51,685 What does this "Top 10" list tell us about the population of all the country's college tuitions? O A. All colleges have tuitions around the median. O B. All colleges have tuitions around the mean. O C. All colleges have tuitions around the midrange. O D. All colleges have tuitions around the mode. O E. Nothing meaningful can be concluded from this information except that these are the largest tuitions of colleges in the country for a recent year. NextListed below are the annual tuition amounts of the 10 most expensive colleges in a country for a recent year. What does this "Top 10" list tell us about the population of all of that country's college tuitions? $53,945 $54,186 $52,618 $53,878 $52,618 $50,539 $51,099 $51,614 $50,510 $51,685 What is (are) the mode(s) of the data set? Select the correct choice below and, if necessary, fill in the answer box within your choice. O A. The mode(s) of the data set is (are) $ (Use a comma to separate answers as needed. Round to two decimal places as needed.) O B. There is no mode. What does this ITon 1All lint tall war mulation of all the NextThe brain volumes (cm) of 20 brains have a mean of 1178.9 cm and a standard deviation of 122.7 cm. Use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or significantly high. For such data, would a brain volume of 1474.3 cm be significantly high? Is 1474.3 cm significantly high? O A. No, because it is between the limits separating values. O B. No, because it is above the upper limit separating value. O C. No, because it is below the lower limit separating value. O D. Yes, because it is below the lower limit separating value. O E. Yes, because it is between the limits separating values. OF. Yes, because it is above the upper limit separating value. NextFind the (a) mean, (b) median, (c) mode, and (d) midrange for the given sample data. An experiment was conducted to determine whether a deficiency of carbon dioxide in the soil affects the phenotype of peas. Listed below are the phenotype codes where 1 = smooth-yellow, 2 = smooth-green, 3 = wrinkled-yellow, and 4 = wrinkled-green. Do the results make sense? 4 1 4 1 2 3 3 3 4 3 3 1 4 3 D Do the measures of center make sense? O A. All the measures of center make sense since the data is numerical. O B. Only the mode makes sense since the data is nominal. O C. Only the mean, median, and mode make sense since the data is numerical. O D. Only the mean, median, and midrange make sense since the data is nominal.Among fatal plane crashes that occurred during the past 55 years, 130 were due to pilot error, 51 were due to other human error, 522 were due to weather, K 250 were due to mechanical problems, and 595 were due to sabotage. Construct the relative frequency distribution. What is the most serious threat to aviation safety, and can anything be done about it? Complete the relative frequency distribution below. Relative Cause Frequency Pilot error % Other human error % Weather % Mechanical problems % Sabotage % Next