SDS 306 Homework | Questions with Verified Answers

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SDS 306 Homework | Questions with Verified Answers The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current ... grade level, standardized test scores in reading and mathematics. What type of variable is current grade level? a. quantitative b. identifier c. categorical The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and mathematics. What types of variable(s) are the standardized test scores in reading and mathematics? a. categorical b. quantitative c. identifier The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and mathematics. What type of variable is race or ethnicity? a. categorical b. identifier c. quantitative Age Group and Musical Preference Pop: (Under 20) 133; (20-40) 119; (40+) 107 Rock/Alternative: (Under 20) 102; (20-40) 127; (40+) 74 Rap/Hip-Hop: (Under 20) 97; (20-40) 109; (40+) 75 Country: (Under 20) 52; (20-40) 107; (40+) 79 Jazz: (Under 20) 76; (20-40) 83; (40+) 95 What percentage of the sample primarily prefers Jazz? a. 17.70% b. 29.97% c. 22.67% d. 32.06% Age Group and Musical Preference Pop: (Under 20) 133; (20-40) 119; (40+) 107 Rock/Alternative: (Under 20) 102; (20-40) 127; (40+) 74 Rap/Hip-Hop: (Under 20) 97; (20-40) 109; (40+) 75 Country: (Under 20) 52; (20-40) 107; (40+) 79 Jazz: (Under 20) 76; (20-40) 83; (40+) 95 What percentage of the sample is older than 40 years old? a. 6.84% b. 18.66% c. 17.70% d. 29.97% Age Group and Musical Preference Pop: (Under 20) 133; (20-40) 119; (40+) 107 Rock/Alternative: (Under 20) 102; (20-40) 127; (40+) 74 Rap/Hip-Hop: (Under 20) 97; (20-40) 109; (40+) 75 Country: (Under 20) 52; (20-40) 107; (40+) 79 Jazz: (Under 20) 76; (20-40) 83; (40+) 95 What percentage of those who prefer Rock/Alternative are between the ages of 20 and 40? a. 33.665 b. 24.42% c. 41.91% d. 39.08% Age Group and Musical Preference Pop: (Under 20) 133; (20-40) 119; (40+) 107 Rock/Alternative: (Under 20) 102; (20-40) 127; (40+) 74 Rap/Hip-Hop: (Under 20) 97; (20-40) 109; (40+) 75 Country: (Under 20) 52; (20-40) 107; (40+) 79 Jazz: (Under 20) 76; (20-40) 83; (40+) 95 What percentage of the sample prefer Rock/Alternative and are between the ages of 20 and 40? a. 8.85% b. 6.31% c. 10.76% d. 3.84% Age Group and Musical Preference Pop: (Under 20) 133; (20-40) 119; (40+) 107 Rock/Alternative: (Under 20) 102; (20-40) 127; (40+) 74 Rap/Hip-Hop: (Under 20) 97; (20-40) 109; (40+) 75 Country: (Under 20) 52; (20-40) 107; (40+) 79 Jazz: (Under 20) 76; (20-40) 83; (40+) 95 What is the marginal distribution of age group? a. 560-604-271 b. 387-523-525 c. 460-545-430 d. 497-443-495 Age Group and Musical Preference Pop: (Under 20) 133; (20-40) 119; (40+) 107 Rock/Alternative: (Under 20) 102; (20-40) 127; (40+) 74 Rap/Hip-Hop: (Under 20) 97; (20-40) 109; (40+) 75 Country: (Under 20) 52; (20-40) 107; (40+) 79 Jazz: (Under 20) 76; (20-40) 83; (40+) 95 What is the conditional distribution of age group for those who prefer Rap/Hip-Hop? a. 14.46%, 35.67%, 49.87% b. 27.81%, 41.77%, 30.42% c. 9.19%, 38.67%, 52.14% d. 34.52%, 38.79%, 26.69% The age at which a person retires from their respective career. a. Bimodal and skewed b. Unimodal and symmetric c. Bimodal and symmetric d. Uniform e. Unimodal and skewed Height of students at a local area high school. a. Bimodal and skewed b. Unimodal and symmetric c. Bimodal and symmetric d. Uniform e. Unimodal and skewed The probabilities of drawing a diamond, heart, club, or spade from a traditional deck of cards. a. Bimodal and skewed b. Unimodal and symmetric c. Bimodal and symmetric d. Uniform e. Unimodal and skewed (Plymouth wind speeds) Is the distribution unimodal, bimodal, multi-modal, or uniform? a. unimodal b. bimodal c. multi-modal d. uniform (Plymouth wind speeds) The distribution is symmetric. a. true b. false (Plymouth wind speeds) What does this mean? a. No information can be determined b. It is more likely to observe a wind speed between 4 and 13 knots c. There are the same amount of observed wind speeds of 32 knots or higher as there are number of observations 4 knots or lower Calories in a 12 oz. beer Beer: Calories Heineken: 148 Miller Genuine Draft: 143 Newcastle Brown Ale: 138 Pabst Blue Ribbon: 145 Red Stripe: 151 Keystone Light: 104 Blue Moon: 164 Sam Adams Boston Lager: 170 What is the average calorie count for a 12oz bottle of beer? a. 147.33 b. 116.3 c. 145.38 d. 150.66 Calories in a 12 oz. beer Beer: Calories Heineken: 148 Miller Genuine Draft: 143 Newcastle Brown Ale: 138 Pabst Blue Ribbon: 145 Red Stripe: 151 Keystone Light: 104 Blue Moon: 164 Sam Adams Boston Lager: 170 What is the median? a. 104 b. 170 c. 140.5 d. 146.5 Calories in a 12 oz. beer Beer: Calories Heineken: 148 Miller Genuine Draft: 143 Newcastle Brown Ale: 138 Pabst Blue Ribbon: 145 Red Stripe: 151 Keystone Light: 104 Blue Moon: 164 Sam Adams Boston Lager: 170 What is the range of the middle 50% of data? a. 28 b. 298 c. 17 d. 66 Calories in a 12 oz. beer Beer: Calories Heineken: 148 Miller Genuine Draft: 143 Newcastle Brown Ale: 138 Pabst Blue Ribbon: 145 Red Stripe: 151 Keystone Light: 104 Blue Moon: 164 Sam Adams Boston Lager: 170 What is the standard deviation? a. 17.64 b. 19.87 c. 145.36 d. 18.59 Calories in a 12 oz. beer Beer: Calories Heineken: 148 Miller Genuine Draft: 143 Newcastle Brown Ale: 138 Pabst Blue Ribbon: 145 Red Stripe: 151 Keystone Light: 104 Blue Moon: 164 Sam Adams Boston Lager: 170 Using the 1.5xIQR rule, for how many of these brands are the calories in a 12oz bottle considered an outlier? a. 2 b. 3 c. 0 d. 1 n: (male) 80; (female) 82 mean: (male) 152.8; (female) 148.5 SD: (male) 8; (female) 7.1 Min: (male) 138; (female) 136 Q1: (male) 144; (female) 142 Med: (male) 149; (female) 147 Q3: (male) 159; (female) 153 Max: (male) 167; (female) 159 On average, which group scored better on the GRE? a. Male b. Female n: (male) 80; (female) 82 mean: (male) 152.8; (female) 148.5 SD: (male) 8; (female) 7.1 Min: (male) 138; (female) 136 Q1: (male) 144; (female) 142 Med: (male) 149; (female) 147 Q3: (male) 159; (female) 153 Max: (male) 167; (female) 159 Which group has more variability among their scores? a. Male b. Female n: (male) 80; (female) 82 mean: (male) 152.8; (female) 148.5 SD: (male) 8; (female) 7.1 Min: (male) 138; (female) 136 Q1: (male) 144; (female) 142 Med: (male) 149; (female) 147 Q3: (male) 159; (female) 153 Max: (male) 167; (female) 159 Is the female distribution skewed or symmetric? a. cannot determine b. symmetric c. skewed n: (male) 80; (female) 82 mean: (male) 152.8; (female) 148.5 SD: (male) 8; (female) 7.1 Min: (male) 138; (female) 136 Q1: (male) 144; (female) 142 Med: (male) 149; (female) 147 Q3: (male) 159; (female) 153 Max: (male) 167; (female) 159 Given the shape of the female distribution, what would be the appropriate measure of center to use? a. mean b. median c. cannot determine n: (male) 80; (female) 82 mean: (male) 152.8; (female) 148.5 SD: (male) 8; (female) 7.1 Min: (male) 138; (female) 136 Q1: (male) 144; (female) 142 Med: (male) 149; (female) 147 Q3: (male) 159; (female) 153 Max: (male) 167; (female) 159 Given the shape of the female distribution, what would be the appropriate measure of spread to use? a. cannot determine b. IQR c. Standard deviation (city mileage for vehicle types) Which vehicle type, on average, gets the fewest miles per gallon in the city? a. Sports b. Hybrid c. SUV d. Wagon e. Truck f. Sedan (city mileage for vehicle types) Is it always the case that vehicles classified as a wagon have higher city MPG's than vehicles classified as an SUV? a. Yes b. No The speed of cars driving through a neighborhood with a posted speed limit of 45 mph was recorded. Suppose that the data followed a normal model and that the mean and standard deviation were 49.83 mph and 6.28 mph, respectively. What percent of cars travel at or below the posted speed limit? a. 22.06% b. 77.94% c. 50% d. 25.71% The speed of cars driving through a neighborhood with a posted speed limit of 45 mph was recorded. Suppose that the data followed a normal model and that the mean and standard deviation were 49.83 mph and 6.28 mph, respectively. What percent of cars that travel through this neighborhood do so at speeds between the speed limit and 5 mph over the speed limit? a. 29.14% b. 50% c. 33.33% d. 73.26% The speed of cars driving through a neighborhood with a posted speed limit of 45 mph was recorded. Suppose that the data followed a normal model and that the mean and standard deviation were 49.83 mph and 6.28 mph, respectively. Half of the cars travel above what speed? a. 49.83 mph b. 56.1 mph c. 45 mph d. 43.54 mph The speed of cars driving through a neighborhood with a posted speed limit of 45 mph was recorded. Suppose that the data followed a normal model and that the mean and standard deviation were 49.83 mph and 6.28 mph, respectively. 25% of cars travel below what speed? a. 45.62 mph b. 47.53 mph c. 60 mph d. 42.81 mph In a Standard Normal model, what z-score values cutoff the middle. 95%? a. -3, 3 b. -2, 2 c. -1.645, 1.645 d. -1.96, 1.96 In a Standard Normal model, what z-score values cutoff the middle. 99%? a. -2.33, 2.33 b. -3, 3 c. -1.6, 1.6 d. -2.58, 2.58 u = 15, o = ?, 30% below 11 a. 6.47 b. 7.69 c. 10.91 d. 5.23 u = ?, o = 9, 22% above 20 a. 12.43 b. 14.87 c. 15.91 d. 13.07 A study found the correlation between temperature (°F) and ice cream sales to be 0.96. Which of the following statements is/are justified? I. When the temperature increases, ice cream sales always increase as well. II. The form of the relationship between temperature and ice cream sales is perfectly straight. III. There are outliers in the scatterplot of temperature and ice cream sales. IV. If we were to measure temperature in °C instead of °F, the correlation will decrease. a. II only b. None of the above c. I and II d. I only e. IV only f. I and IV g. III only h. I, II, and IV (scatterplots) a. I: 0.01, II: -0.49, III: -0.94, IV: 0.78 b. I: -0.94, II: 0.78, III: -0.49, IV: 0.01 c. I: -0.94, II: -0.49, III: 0.01, IV: 0.78 d. I: -0.49, II: 0.01, III: 0.78, IV: -0.94 e. I: 0.78, II: 0.01, III: -0.94, IV: -0.49 1: (Exam 1) 68; (Final) 76 2: (Exam 1) 83; (Final) 83 3: (Exam 1) 75; (Final) 74 4: (Exam 1) 100; (Final) 95 5: (Exam 1) 64; (Final) 74 6: (Exam 1) 84; (Final) 79 7: (Exam 1) 79; (Final) 73 8: (Exam 1) 68; (Final) 86 9: (Exam 1) 90; (Final) 92 10: (Exam 1) 53; (Final) 62 Mean: (Exam 1) 76.40; (Final) 79.40 SD: (Exam 1) 13.72; (Final) 9.85 What is the correlation between the first and final exam? [Show More]

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