MATH 221 Exam 1 Review

Scores disproportionately clustered at the upper-end of the distribution

What are the 2 main ways that distributions differ?

When we identify individuals and collect information as events unfold

Random error is due to...

If we have a population and 40% are younger than 10 and we randomly sample 50, about how many should be younger than 10?

The further points are from the mean...

More time is spent trying to minimize this kind of error

Hypotheses are...

What is a way that we might try to operationalize girls' interest in STEM?

We can categorize data by:

Skew refers to...

Kurtosis refers to...

What are the 2 parts to error in CTT?

Time spent studying for this exam is an example of which kind of data?

We can say things like 5 is twice as old as 10 with this kind of data.

when we take things that are not measurable and try to define and measure them

Coffee prices is an example of what kind of data?

Which is an example of a null hypothesis?

The order of the numbers and the differences between numbers are meaningful with this data, but there is no true zero.

If the score 9 has a Z-score of -1, that means...

Shoe sizes is an example of which kind of data?

What is it called when we pick our sample by putting everyone's name in a hat and draw names, like a raffle?

When might we use a proxy measurement?

Which 2 things help to reduce bias and uncertainty in a study?

If a distribution has a mean = 10 and a median = 10, what can we say about this distribution?

Operational definitions get increasingly important...

Suppose our sample is athletes that play a fall sport. Choose the population below:

Validity has to do with...

Length of hair is an example of which kind of data?

Which of the following is MOST sensitive to outliers?

standard scores allow us to...

P(X) = 0 means

A disproportionately low number of scores in the tails

When we pick our sample by dividing the population into groups called strata and use a sampling method in each strata

When we collect data after events have taken place

Which kind of data should we not run statistics on but we could make frequency charts?

A normal distribution has

Number of pieces of candy you eat on Halloween is an example of which kind of data?

Reliability has to do with...

Scores disproportionately clustered at the lower-end of the distribution

Which set of 3 are the measures of central tendency?

Probability relates to...

what is a fake treatment used because researchers prefer that patients in a study don't know the group they're in

In CTT, the true score is...

Suppose our population is all data science majors. Choose the sample below:

What is the T in the Classical Test Theory equation?

probability of all possible outcomes must

Temperature in Fahrenheit is an example of what kind of data?

T-shirt sizes is an example of what kind of data?

P(X) = 1 means

Boolean data is an example of

In CTT, the observed score is...

A disproportionately high number of scores in the tails

If the score 10 has a Z-score of 2, that means...

Which of the following are the 4 measures of variability?

In CTT, the error score is...

In a study, we want volunteers randomly placed into 2 groups:

What is the E in the Classical Test Theory equation?

Places in a race (1st, 2nd, 3rd) are an exmaple of what kind of data?

Asking the class what everyone's favorite color is is an example of which kind of data?

How might we try to operationalize religion?

The following is true for which kind of data: numbers are not really numeric, i.e. don't have numerical meaning

Which is an example of an alternative hypothesis?

We rarely demonstrate that a theory is true

If a distribution has a mean = 3 and a median = 13, what can we say about this distribution?

What is the X in the Classical Test Theory equation?

Which kind of data can we compute the median with but not other statistics?

If a distribution has a mean = 12 and a median = 8, what can we say about this distribution?

probability values must be between

The state that everyone was born in is an example of what kind of data?