math 221 quiz week 3 devry
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MATH 221 Quiz Week 3 DeVry http://www.hiqualitytutorials.com/product/math-221-quiz-week-3-statics-for-decision/ALL Answers are 100% Correct, 3 Sets. Details are Available at the Link Listed Above These quizzes include formulas in Excel and in Word that can be used if numeric data is different from the one listed below1. Use the Venn diagram to identify the population and the sample....Choose the correct description of the population.A. The number of home owners in the stateB. The income of home owners in the state who own a carC. The income of home owners in the stateD. The number of home owners in the state who own a carChoose the correct description of the sampleA. The income of home owners in the state who own a carB. The income of home owners in the stateC. The number of home owners in the state who own a carD. The number of home owners in the state2. Determine whether the variable is qualitative or quantitative.Favorite sportIs the variable qualitative or quantitative?A. QualitativeB. Quantitative3. Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are shown below.43 50 10 91 76 35 64 36 42 72 53 62 35 74 5072 36 28 38 61 48 63 35 41 22 36 50 46 85 13To find the 10% trimmed mean of a data set, order the data, delete the lowest 10% of the entries and highest 10% of the entries, and find the mean of the remaining entries. Complete parts (a) through (c).(a) Find the 10% trimmed mean for the data.The 10% trimmed mean is. (Round to the nearest tenth as needed.)(b) Compare the four measures of central tendency, including the midrange.Mean = (Round to the nearest tenth as needed.)Median =Mode = (Use a comma to separate answers as needed.)Midrange = (Round to the nearest tenth as needed.)(c) What is the benefit of using a trimmed mean versus using a mean found using all data entries?A. It simply decreases the number of computations in finding the mean.B. It permits the comparison of the measures of central tendency.C. It permits finding the mean of a data set more exactly.D. It eliminates potential outliers that could affect the mean of the entries.4. Construct a frequency distribution for the given data set using 6 classes. In the table, include the midpoints, relative frequencies, and cumulative frequencies. Which class has the greatest frequency and which has the least frequency?Amount (in dollars) spent on books for a semester457 146 287 535 442 543 46 405 496 385 517 56 33 132 6499 378 145 30 419 336 228 376 227 262 340 172 116 285Complete the table, starting with the lowest class limit. Use the minimum data entry as the lower limit of the first class. (Type integers or decimals rounded to the nearest thousandth as needed.)Which class has the greatest frequency?The class with the greatest frequency is from to.Which class has the least frequency?The class with the least frequency is from to.5. Identify the data set’s level of measurement.The nationalities listed in a recent survey (for example, American, German, or Brazilian)A. NominalB. OrdinalC. IntervalD. Ratio6. Explain the relationship between variance and standard deviation. Can either of these measures be negative?Choose the correct answer below.A. The standard deviation is the negative square root of the variance. The standard deviation can be negative but the variance can never be negative.B. The standard deviation is the positive square root of the variance. The standard deviation and variance can never be negative. Squared deviations can never be negative.C. The variance is the negative square root of the standard deviation. The variance can be negative but the standard deviation can never be negative.D. The variance is the positive square root of the stTRANSCRIPT
MATH 221 Quiz Week 3 DeVry http://www.hiqualitytutorials.com/product/math-221-quiz-week-3-statics-for-decision/
ALL Answers are 100% Correct, 3 Sets. Details are Available at the Link Listed Above
These quizzes include formulas in Excel and in Word that can be used if numeric data is different from the one listed below
1. Use the Venn diagram to identify the population and the sample....
Choose the correct description of the population.A. The number of home owners in the stateB. The income of home owners in the state who own a carC. The income of home owners in the stateD. The number of home owners in the state who own a carChoose the correct description of the sampleA. The income of home owners in the state who own a carB. The income of home owners in the stateC. The number of home owners in the state who own a carD. The number of home owners in the state2. Determine whether the variable is qualitative or quantitative.Favorite sportIs the variable qualitative or quantitative?A. QualitativeB. Quantitative3. Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are shown below.43 50 10 91 76 35 64 36 42 72 53 62 35 74 5072 36 28 38 61 48 63 35 41 22 36 50 46 85 13To find the 10% trimmed mean of a data set, order the data, delete the lowest 10% of the entries and highest 10% of the entries, and find the mean of the remaining entries. Complete parts (a) through (c).(a) Find the 10% trimmed mean for the data.The 10% trimmed mean is. (Round to the nearest tenth as needed.)(b) Compare the four measures of central tendency, including the midrange.Mean = (Round to the nearest tenth as needed.)Median =Mode = (Use a comma to separate answers as needed.)Midrange = (Round to the nearest tenth as needed.)(c) What is the benefit of using a trimmed mean versus using a mean found using all data entries?A. It simply decreases the number of computations in finding the mean.B. It permits the comparison of the measures of central tendency.C. It permits finding the mean of a data set more exactly.D. It eliminates potential outliers that could affect the mean of the entries.
4. Construct a frequency distribution for the given data set using 6 classes. In the table, include the midpoints, relative frequencies, and cumulative frequencies. Which class has the greatest frequency and which has the least frequency?Amount (in dollars) spent on books for a semester457 146 287 535 442 543 46 405 496 385 517 56 33 132 6499 378 145 30 419 336 228 376 227 262 340 172 116 285Complete the table, starting with the lowest class limit. Use the minimum data entry as the lower limit of the first class. (Type integers or decimals rounded to the nearest thousandth as needed.)
Which class has the greatest frequency?The class with the greatest frequency is from to.Which class has the least frequency?The class with the least frequency is from to.5. Identify the data set’s level of measurement.The nationalities listed in a recent survey (for example, American, German, or Brazilian)A. NominalB. OrdinalC. IntervalD. Ratio6. Explain the relationship between variance and standard deviation. Can either of these measures be negative?Choose the correct answer below.A. The standard deviation is the negative square root of the variance. The standard deviation can be negative but the variance can never be negative.B. The standard deviation is the positive square root of the variance. The standard deviation and variance can never be negative. Squared deviations can never be negative.C. The variance is the negative square root of the standard deviation. The variance can be negative but the standard deviation can never be negative.D. The variance is the positive square root of the standard deviation. The standard deviation and variance can never be negative. Squared deviations can never be negative.7. For the following data (a) display the data in a scatter plot, (b) calculate the correlation coefficient r, and (c) make a conclusion about the type of correlation.The number of hours 6 students watched television during the weekend and the scores of each student who took a test the following Monday.....