Tutor profile: Laurel D.
Correct the following sentence and explain why: An important part of my life have been the people who stood by me.
An important part of my life has been the people who stood by me. The subject and verb in the sentence must be matching. The subject is 'life' and the verb referring to it is 'have'. Since 'life' is singular and not plural, 'have' must also be singular, so instead it should be 'has'.
If a rent ceiling is instituted below the market price, which is higher, quantity supplied or quantity demanded?
If we draw a horizontal line on a supply/demand graph below the intersection of the supply and demand curves, this is our rent ceiling. We will notice that the intersection of the demand curve and the rent ceiling is to the right of the intersection of the supply curve and the rent ceiling, so quantity demanded is higher.
When conducting a hypothesis test, how do I decide whether to use a one tailed or two tailed test?
We can determine whether to use a one or two tailed test based on the wording of the question. For example, if the question is "The school drop out rate last year was 15%, is the rate this year the same?", then we would we would consider a two tailed test. We are not sure whether the rate this year will be greater, lower, or the same as last year. On the other hand, if the question is "The school drop out rate last year was 15%, is the rate this year lower?", then we would consider a one tailed test. The question already tells us that we are only concerned with one side of the graph, or whether this year's rate is lower than last year or not.
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