1. If a researcher rejects a null hypothesis, what type of error might they be committing?...

1.   If a researcher rejects a null hypothesis, what type of error might they be committing?
a.   Type I, alpha
b.   Type II, beta
c.   Type III, sigma
d.   Type IV, gamma

2.   The normal curve:
a.   Is asymmetrical and asymptoptic
b.   Has a mean, median and mode equal to zero
c.   Has a standard deviation of zero
d.   Can only be used as a descriptive statistic

3.   The Central Limit Theorem:
a.   Can only be applied to characteristics with a normal distribution
b.   Assumes a population distribution is normal
c.   Allows us to use inferential statistics methods even if a population distribution is not normal
d.   States hypothesis testing should only be used if the variables are continuous with normal distributions

4.   A researcher runs a test for statistical significance and gets a p-value of .003. What statements can be made from this output?
a.   There is a significant positive relationship between the variables.
b.   A beta error has been committed.
c.   There is no relationship between the variables.
d.   There is a significant relationship between the variables.

5.   A researcher finds support for the following hypothesis: There is a negative relationship between average education level and divorce rates in states. Which of the following interpretations could be made?
a.   As average education level in states increase, divorce rates increase.
b.   As divorce rates in states increase, average education levels increase.
c.   As average education levels in states increase, divorce rates decrease.
d.   As divorce rates in states decrease, average education levels decrease.

6.   When an obtained value from a hypothesis test falls in the critical region of a normal curve, any relationship found between the variables is most likely due to:
a.   Systematic influence
b.   Chance
c.   Beta error
d.   Researcher error

7.   Which of the following is an ordinal variable?
a.   Happiness measured as 1=happy or 2=not happy
b.   Relationship status measured as 1=single, 2=divorced, 3=widowed, or 4=married
c.   Life satisfaction measured as 1=very dissatisfied, 2= dissatisfied, 3= satisfied, 4=very satisfied
d.   Happiness measured using an index score of 1 to 100

8.   The most appropriate descriptive statistics to report if happiness is measured as 1=happy and 2=not happy would be:
a.   Mean and standard deviation
b.   Frequency distributions
c.   Mean and ranges
d.   None

9.   Which of the following may be reported based on a significance test?
a.   Whether a relationship found between variables is likely due to chance or not
b.   Strength of a relationship between variables
c.   Meaningfulness of a statistical relationship that is found
d.   Degree of influence of one variable on another

10.   Inferential statistics allow us to:
a.   Infer from a population to a sample
b.   Infer from a sample to a population

Expert Solution

orchestra answered 1 year ago

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