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<\/div><\/div><\/div><\/figure> A concrete mix is designed to withstand 3000 pounds per square inch (psi) of pressure. The following data represent the strength of nine randomly selected casts (in psi). 3970, 4080, 3300, 3200, 2930, 3840, 4080, 4030, 3510 - Compute the mean, median and mode strength of the concrete (in psi). Compute the mean strength of the concrete. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The mean strength of the concrete is psi of pressure. (Round to the nearest tenth as needed.) O B. The mean does not exist. Compute the median strength of the concrete. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The median strength of the concrete is psi of pressure. (Round to the nearest tenth as needed.) O B. The median does not exist. Compute the mode strength of the concrete. Select the correct choice below and, If necessary, fill in the answer box to complete your choice. O A. The mode of the strengths of the concrete is psi of pressure. (Round to the nearest tenth as needed.) O B. The mode does not exist. An insurance company crashed four cars in succession at 5 miles per hour. The cost of repair for each of the four crashes was $427, $461, $416, $230 . Compute the range, sample variance, and sample standard deviation cost of repair. The range is $ s' = dollars? (Round to the nearest whole number as needed.) s = $ (Round to two decimal places as needed.) Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 3000 grams and a standard deviation of 900 grams while babies born after a gestation period of 40 weeks have a mean weight of 3400 grams and a standard deviation of 565 grams. If a 34-week gestation period baby weighs 2625 grams and a 40-week gestation period baby weighs 3025 weighs 3025 grams, find the corresponding z-scores. Which baby weighs less r y weighs less relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively less? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. The baby born in week 34 weighs relatively less since its z-score, , is larger than the z-score of for the baby born in week 40 O B. The baby born in week 34 weighs relatively less since its z-score, . is smaller than the z-score of for the baby born in week 40. O C. The baby born in week 40 weighs relatively less since its z-score, , is larger than the z-score of for the baby born in week 34 O D. The baby born in week 40 weighs relatively less since its z-score, , is smaller than the z-score of for the baby born in week 34. The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) Compute the z-score corresponding to the Individual who obtained 40.1 miles per gallon. Interpret this result. (5) Determine the quarules. (c) Compute and interpret the interquartile range, IQR. (dd) Determine the lower and upper fences. Are there any outliers? Eff Click the icon to view the data. (a) Compute the z-score corresponding to the individual who obtaine ined 40.1 miles per gallon. Interpret this result. The z-score corresponding to the individual is | and indicates that the data value is ]standard deviation(s) the (Type integers or decimals rounded to two decimal places as needed.) (b) Determine the quartiles. Q1 = 36.9 mpg (Type an integer or a decimal. Do not round.) Q, =mpg Type an integerSuppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 3000 grams and a standard deviation of 900 grams while babies born after a gestation period of 40 weeks have a mean weight of 3400 grams and a standard deviation of 565 grams. If a 34-week gestation period baby weighs 2625 grams and a 40-week gestation period baby weighs 3025 grams, find the corresponding z-scores. Which baby weighs less relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively less? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places a O A. The baby born in week 34 weighs relatively less since its z-score, | , is larger than the z-score of for the baby born in week 40. O B. The baby born in week 34 weighs relatively less since its z-score, , is smaller than the z-score of for the baby born in week 40. O C. The baby born in week 40 weighs relatively less since its z-score, , is larger than the z-score of for the baby born in week 34. O D. The baby born in week 40 weighs relatively less since its z-score, , is smaller than the z-score of for the baby born in week 34. accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder. 1.0 liter engine. (a) Compute the z-score corresponding to the Individual who obtained 40.1 miles per gallon. Interpret this result. (b) Determine the quartiles. (c) Compute and interpret the interquartile range, IQR. (d) Determine the lower and upper fences. Are there any outliers? Click the icon to view the data. (a) Compute the z-score corresponding to the individual who obtained 40.1 miles per gallon. Interpret this result. The z-score corresponding to the individual is | |and indicates that the data value is ]standard deviation(s) | the (Type integers or decimals rounded to two decimal places as needed.) (b) Determine the quartiles. 1 = 36.9 mpg (Type an integer or a decimal. Do not round.) Q, =mpg (Type an integer or a decimal. Do not round.) 2g =mpg (Type an Integer or a decimal. Do not round.) c) Compute and interpret the interquartile range, IQR. Select the correct choice and fill in the answer box to complete your choice. O A. The interquartile range is mpg. It is the range of the middle 50% of the observations in the data set. O B. The interquartile range is mpg. It is the range of the over and upper fences O C. The interquartile range is |mog. It is the range of the ob ean either the lower or upper quartile and the middle quartile; it captures 25% of the observations. O D. The interquartile range is | mog. It is t range of all of the observations in the data set. (d) Determine the lower and upper fences. Are there any outliers? The lower fence is 1. Time Remaining: 03:28:27 Next The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) Compute the z-score corresponding to the individual who obtained 40.1 miles per gallon. Interpret this result. (D) Determine the quartiles. () Compute and interpret the interquartile range, IQR. (d) Determine the lower and upper fences. Are there any outliers? Click the icon to view the data. Q, = mpg (Type an integer or a decimal. Do not round.) c) Compute and interpret the interquartile range, IQR. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. The interquartile range is mog. It is the range of the middle 50% of the obs servations in the data set. O B. The interquartile range is mog. It is the range of the ob ween the lower and upper fences. O C. The Interquartile range is |mog. It en either the lower or upper quartile and the middle quartile; it captures 25% of the observations. O D. The Interquartile range is mpg. It rvations in the data set (d) Determine the lower and upper fences. Are there any outliers? The lower fence is (Type an integer or a decimal. Do not round.) The upper fence is (Type an integer or a decimal. Do not round.) Are there any outliers? Select the correct choice below and, if necessary. fill in the answer box to complete your choice. O A. The outlier(s) is\/are. (Type an integer or a decimal. Do not round. Use a comma to separate answers as needed.)The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) Compute the z-score corresponding to the individual who obtained 40.1 miles per gallon. Interpret this result. (c) Compute and interpret the interquartile range, IQR. (d) Determine the lower and upper fences. Are there any outliers? Click the icon to view the data. . .. Q, = mpg (Type an integer or a decimal. Do not round.) (c) Compute and interpret the interquartile range, IQR. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. The interquartile range is | mog. It is the range of the middle 50% of the observations in the data set. O B. The interquartile range is|mog. It is the range of the observations between the lower and upper fences O C. The Interquartile range is |mog. It is the range of the of ervations between either the lower or upper quartile and the middle quartile; it captures 25% of the observations. O D. The interquartile range is |mog. It is the range of all of the of servations in the data set. (d) Determine the lower and upper fences. Are there any outliers? The lower fence is (Type an integer or a decimal. Do not round.) The upper fence is (Type an integer or a decimal. Do not round.) Are there any outliers? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The outlier(s) is\/are (Type an integer or a decimal. Do not round. Use a comma to separate answers as needed.) O B. There are no outliers. Time Remaining: 03:28:14 Next The following data represent the dividend yields (in percent) of a random sample of 28 publicly traded stocks. Complete parts (a) to (c) 0.74 0.12 29 8 WNN 2 898 0.27 EN (a) Compute the five-number summary. The five-number summary is . . 0.O.O. (Round to two decimal places as needed. Use ascending order.) (b) Draw a boxplot of the data. OA OB O c Q (c) Determine the shape of the distribution from the boxplot. O A. The distribution is skewed to the left. O B. The distribution is roughly symmetric. O C. The distribution is skewed to the right. O D. The shape of the distribution cannot be determined from the boxplot. Time Remaining: 03:27:59 Next The data below represent the number of days absent, x, and the final grade. y. for a sample of college students at a large university. Complete parts (a) through (e) below. Final grade, y No. of absences. * 875 84.6 81.6 79.1 76.0 71.6 61.7 684 65.5 685The data below represent the number of days absent, x, and the final grade, y. for a sample of college students at a large university. Complete parts (a) through (e) below. No. of absences, x Final grade, y 87 5 84.6 81.6 79.1 76.0 71.6 61.7 664 63.5 60.5 (a) Find the least-squares regression line treating the number of absences, x, as the explanatory variable and the final grade. y. as the response variable. y=x+ (D (Round to three decimal places as needed.) (b) Interpret the slope and y-intercept, if appropriate. Interpret the slope. Select the correct choice below and, if necessary. fill in the answer box to complete your choice. (Round to three decimal places as needed.) O A. For every unit change in the final grade, the number of days absent falls by days, on average O B. For zero days absent, redicted to be O C. For every day absent, the final grade falls by , on average. O D. For a final score of zero, the number of days absent is predicted to be days. O E. It is not appropriate to interpret the slope. Interpret the y-intercept. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as need O A. For every day absent, the final grade falls by . on average O B. For a final score of zero, the number of days abse it is predicted to be days. O C. For zero days absent, the final score edicted to be O D. For every unit change in the final grade, the number of days absent falls by |days, on average. O E. It is not appropriate to interpret the y-intercept Time Remaining: 03:27:44 Next The data below represent the number of days absent, x. and the final grade. y. for a sample of college students at a large university. Complete parts (a) through (s) below. No. of absences, x Final grade, y 87.5 84.6 81.6 79.1 76.0 71.6 61.7 66.4 63.5 60.5 O D. For every unit change in the final grade, the number of days absent falls by | |days, on average. O E. It is not appropriate to he y-intercept. (c) Predict the final grade for a student e residual. Is the observed final grade above or below average for this number of absences? The predicted final grade is . This observation has a residual of , which indicates that the final grade is ||average. (Round to one decimal place as needed.) (d) Draw the least-squares regression lin catter diagram of the data. Choose the correct graph below. OA OB O C. OD 100 100 100 Q (e) Would it be reasonable to use the least-squares regression line to predict the final grade for a student who has missed 15 class periods? Why or why not? O A. Yes-15 missed class periods is possible and within the scope of the mode O B. No-15 missed class periods is not possible and outside the scope of the model. O C. No-15 missed class periods is outside the scope of the model. O D. No-15 missed class periods is not possible. O E. More Information regarding the student is necessary to be able to make a decision. Time Remaining: 03:27:32 Next Show transcribed image text",
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"question_posted": "2024-06-28 03:34:29",
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