Statistics (SOPHIA)

UNIT 4 — MILESTONE 4 Score 17/18 You passed this Milestone 17 questions were answered correctly. 1 question was answered incorrectly. 1 This scatterplot shows the maintenance expense for a truck based on its years of service. The equation for least regression line to this data set is ŷ = 76.82x + 88.56. What is the predicted value (in dollars) for maintenance expenses when a truck is 7 years old? $626 $703 $473 $549 RATIONALE In order to get the predicted maintenance expense whe...

UNIT 3 — MILESTONE 3 Score 25/27 You passed this Milestone 25 questions were answered correctly. 2 questions were answered incorrectly. 1 Zhi and her friends moved on to the card tables at the casino. Zhi wanted to figure out the probability of drawing a black Queen or a black Jack. Choose the correct probability of drawing a black Queen or a black Jack. Answer choices are in the form of a percentage, rounded to the nearest whole number. 15% 8% 25% 4% RATIONALE Since the two event...

UNIT 1 — MILESTONE 1 Score 24/29 You passed this Milestone 24 questions were answered correctly. 5 questions were answered incorrectly. 1 A research team conducts a survey to determine the area of land used for farming in Iowa. The team randomly selects house addresses and sends the survey by mail. Which type of sampling method is the research team using? Systematic random sampling Cluster sampling Multi-stage sampling Simple random sampling RATIONALE By choosing randomly from the...