8:27 PM Fri Jun 17 96% webassign.net X 5 10 15 20 O 5 10 15 20 O DO y 80 70 60 50 40 30 20 10 10 O - X 5 10 15 20 X 5 10 15 20 o O (b) What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? The scatter diagram indicates that there is |a negative | relationship between the two variables. (c) Compute the sample covariance. -74 X Based on the sample covariance, what can be said about the relationship between the two variables? There is a strong positive linear relationship between the two variables. There is a strong negative linear relationship between the two variables. There is no relationship between the two variables. There is a positive linear relationship between the two variables, but the strength of this relationship cannot be determined based on the sample covariance. There is a negative linear relationship between the two variables, but the strength of this relationship cannot be determined based on the sample covariance. X (d) Compute the sample correlation coefficient. (Round your answer to three decimal places.) -0.938 Based on the sample correlation coefficient, what can be said about the relationship between the two variables? O There is a strong positive linear relationship between the two variables. There is a strong negative linear relationship between the two variables. There is no relationship between the two variables. There is a positive linear relationship between the two variables, but the strength of this relationship cannot be determined based on the sample correlation coefficient. There is a negative linear relationship between the two variables, but the strength of this relationship cannot be determined based on the sample correlation coefficient. Need Help? Read it Watch Ito) 8:26 PM Fri Jun 17 96% C} E webassignnet (b) Compute the lower and upper limits (in million dollars). lower limit 607.5 X million dollars upper limit m x million dollars (c) Do the data contain any outliers? X of the values are within the limits, therefore there are I Outliers. (d) The largest company on this list has sales of $14,138 million. Suppose a data entry error (a transposition) had t made and the sales had been entered as $41,138 million. Would the method of detecting outliers in part (c) idel this problem and allow for correction of the data entry error? This number gr have shown up as an outlier. (e) Show a boxplot. O 0 2000 4000 6000 8000 100001200014000 (D O 0 2000 4000 6000 8000 10000120001400016000 (D o 0 2000 4000 6000 8000 10000120001400016000 (D 2 0 2000 4000 6000 8000 100001200014000 (D Need Help? 8:27 PM Fri Jun 17 '5" 96% E} E webassignnet 11. [1.03I1.53 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 3.E.055. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Five observations taken for two variables follow. (b) What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? The scatter diagram indicates that there is v .f relationship between the two variables. (c) Compute the sample covariance. -x Based on the sample covariance, what can be said about the relationship between the two variables? 0 There is a strong positive linear relationship between the two variables. 0 There is a strong negative linear relationship between the two variables. 0 There is no relationship between the two variables. 0 There is a positive linear relationship between the two variables, but the strength of this relationship cannot be determined based on the sample covariance. rx 8:26 PM Fri Jun 17 .3) 96% E} E webassignnet 6. [0.63/1 .53 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 3.E.O42. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Many families in California are using backyard structures for home ofces, art studios, and hobby areas as well as for additional storage. Suppose that the mean price for a customized wooden, shingled backyard structure is $3,100. Ass: that the standard deviation is $1,200. (a) What is the zscore for a backyard structure costing $2,100? (Round your answer to two decimal places.) (b) What is the z-score for a backyard structure costing $6,100? z=- (c) Interpret the z-scores in parts (a) and (b). Comment on whether either should be considered an outlier. The cost $2,100 is 0.83 standard deviations m v q the mean, therefore it is v $6,100 is 2.50 standard deviations v V the mean, therefore it is v . (d) The cost for a backyard shed-ofce combination built in Albany, California, is $14,200. Compute the z-score for' structure. z=- Should this structure be considered an outlier? Explain. This structure is V because the z-score is v . . The Need Help? 7. [03311.53 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 3.E.O46.Ml. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Consider a sample with data values of 25, 23, 18, 13, 28, 32, 26, and 23. Provide the five-number summary for the d minimum v rst quartile X median ./ third quartile X maximum ./ Need Help? o) 8:26 PM Fri Jun 17 96% C} E webassignnet 10. [03111.53 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 3.E.051.Ml. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Annual sales, in millions of dollars, for 21 pharmaceutical companies follow. 14,138 6,452 1,750 10,398 7,578 (a) Provide a ve-number summary (in million dollars). minimum 608 y million dollars rst quartile 1761 J million dollars median million dollars third quartile 8456.5 million dollars &&\\ maximum 14138 million dollars (b) Compute the lower and upper limits (in million dollars). lower limit 607.5 x million dollars upperlimit 14.1385 x million dollars (c) Do the data contain any outliers? X of the values are within the limits, therefore there are .r outliers. (d) The largest company on this list has sales of $14,138 million. Suppose a data entry error (a transposition) had t made and the sales had been entered as $41,138 million. Would the method of detecting outliers in part (c) idel this problem and allow for correction of the data entry error? This number ./ have shown up as an outlier. (e) Show a boxplot. O 0 2000 4000 6000 8000 100001200014000 (D O 0 2000 4000 6000 800010000120001400016000 2. [123/153 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 3.E.037. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Consider a sample with a mean of 30 and a standard deviation of 5. Use Chebyshev's theorem to determine the minin percentage of the data within each of the following ranges. (Round your answers to the nearest integer.) (a) 20 to 40 (b) 15 to 45 -x % (c) 24 to 36 - (d) 18 to 42 - (e) 11 to 49 ., Need Help? 8:26 PM Fri Jun 17 .3) 96% E} E webassignnet 4. [0.511153 Points] DETAILS PREVIOUS ANSWERS ASWSBE14 3.E.O40.Ml. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose that the mean retail price per gallon of regular grade gasoline in the United States is $3.45 with a standard deviation of $0.10 and that the retail price per gallon has a bell-shaped distribution. (a) What percentage of regular grade gasoline sold between $3.35 and $3.55 per gallon? - (b) What percentage of regular grade gasoline sold between $3.35 and $3.65 per gallon? ->