MATH 221 Exam 1 Review

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

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

P(X) = 0 means

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

probability of all possible outcomes must

When we identify individuals and collect information as events unfold

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

Which set of 3 are the measures of central tendency?

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

When we collect data after events have taken place

Probability relates to...

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

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

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

What is the T in the Classical Test Theory equation?

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

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

Boolean data is an example of

Random error is due to...

When might we use a proxy measurement?

Which is an example of a null hypothesis?

Which of the following are the 4 measures of variability?

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

In CTT, the error score is...

In CTT, the observed score is...

We rarely demonstrate that a theory is true

A normal distribution has

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

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

The further points are from the mean...

What are the 2 parts to error in CTT?

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

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

Skew refers to...

Hypotheses are...

Operational definitions get increasingly important...

Kurtosis refers to...

Which is an example of an alternative hypothesis?

Coffee prices is an example of what kind of data?

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

Validity has to do with...

probability values must be between

We can categorize data by:

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

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

More time is spent trying to minimize this kind of error

P(X) = 1 means

Scores disproportionately clustered at the lower-end of the distribution

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

Which of the following is MOST sensitive to outliers?

What is the E in the Classical Test Theory equation?

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

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

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

Scores disproportionately clustered at the upper-end of the distribution

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

In CTT, the true score is...

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

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

Shoe sizes is an example of which kind of data?

standard scores allow us to...

What is the X in the Classical Test Theory equation?

What are the 2 main ways that distributions differ?

Reliability has to do with...

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

A disproportionately high number of scores in the tails

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

How might we try to operationalize religion?

A disproportionately low number of scores in the tails

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