Tutor profile: Megan N.

The cost of manufacturing x crayons is 570 + 0.5x. The crayons sell for 10 cents each. What is the minimum number of crayons that need to be sold so that the revenue received recoups the manufacturing cost?

60 crayons

Make up an operational definition for depression and describe what makes it an operational definition instead of a conceptual definition based on the 2 things that every operational definition needs to include.

The number of times last week that a person cried or felt sad, as measured via a self-report questionnaire. This qualifies as an operational definition because I specified the type of data to be collected (self-report) and I also used quantification in the definition (number of times).

What does the concept of power tells us about the results of an experiment?

It tells you the likelihood of detecting a true difference between the groups that are being studied. This is important because if the null hypothesis is true, but the effect is small, you likely need a lot of power to detect this effect.