answer the following three:

Which of the following describes the conditions necessary for a dependent (or matched pairs) t test? 0 A. The standard deviation of the population must be known for this type of test statistic. O B. Data (or measured observations) are completely independent of one another, indicating that outcomes on one variable are unrelated to outcomes on another variable. 0 C. Data (or measured observations) are related to one another in some way, making the connection between pairs of scores stronger than random connections between scores in group A with scores in group B. O D. Only data sets with over 100 observations can be used. A researcher wants to know if temperature affects the speed at which a person performs a task. Each person completes the task one time in a hot condition (90 degrees) and one time in a cold condition (30 degrees) while wearing the same clothing, and time to completion is measured. It is hypothesized that people in the hot condition will take longerto complete the task. Reaction time is measured in minutes and seconds. Times in the hot condition are considered Population 1; times in the cold condition are considered Population 2. Any differences between them should be conceptualized as (Population 1 - Population 2). Which of the following hypothesis statements represents this situation and what the researcher is investigating? OA-Hozm) 50;Ha:un >0 O B.Ho:up 20;Ha:up M2 O E.Ho:#12M2;Ha:m