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Which of the mixtures is homogeneous?

A student wishes to convert 4351 milliliters to liters. Which calculation would give the correct answer? 

For the following scores, [7,4,4,3,3,3] the mode equals

The key difference between a positively skewed distribution and a negatively skewed distribution is

[example continued…] I’m interested in whether the time of day of watching lectures influences learning. To answer this question, I randomly selected 90 participants. Then I randomly assigned these participants into 3 conditions: In the Morning Condition, participants watched video lectures only in the morning. In the Afternoon Condition, participants watched video lectures only in the afternoon. In the Evening Condition, participants watched video lectures only in the Evening. Afterwards, I measured each conditions’ learning on a test of the lecture material. In this example, control is achieved by  ______________.

What is the value of ΣX2 for the scores 7, 3, 6?

[example continued…] If the following scores are sample data, [7,4,4,3,3,3] the Sample Variance equals

[example continued…] I’m interested in whether the time of day of watching lectures influences learning. To answer this question, I randomly selected 90 participants. Then I randomly assigned these participants into 3 conditions: In the Morning Condition, participants watched video lectures only in the morning. In the Afternoon Condition, participants watched video lectures only in the afternoon. In the Evening Condition, participants watched video lectures only in the Evening. Afterwards, I measured each conditions’ learning on a test of the lecture material. In this example, the dependent variable is ______________.

What is the range for the following set of scores? Scores: 4, 6, 11, 20

[example continued…] For the following frequency table: X f 5 5 4 5 3 2 2 3 1 5 What is ∑X for this frequency distribution table?  (hint: 5 people scored X = 5)