Exam #1 Review

On a box plot 50% of the data fall below the median

Predictive validity and concurrent validity are types of construct validity.

Given r = -0.82 : which of the following describe the relationship?

The reason we use n-1 in the denominator of the standard deviation formula.

Content validity is confirmed when experts determine the test reflects the universe of items in the topic being measured

On a box plot ___% of the values fall below Q3

We may use our book/notes/Canvas shell for the exam.

This is the most precise measurement scale as absolute comparisons can be made.

Subtracting the lowest value of a data set from the highest value of a data set results in this measure.

What is not included in the five number summary?

Samples should be biased in order to represent the population

When sampling based on the proportion of subgroups of interest we use:

To establish this we correlate the scores of our current measure to scores from a valid, similar established measure.

Comparing the percent agreement between two observers on a particular test:

These visualizations are helpful for solving probability problems.

On a box plot, the IQR represents ___% of the distribution.

Which correlation coefficient is interpreted as a strong relationship?

If a test is consistent over time it has:

On a box plot 25% of the data fall between Q1 and Q3

The probability of rolling either a 1 or a 2 on one roll of a die?

When is a test reliable?

Variance is the average variation from the mean

A scatterplot can display ____ between variables

This sample ensures every element has an equal chance of being selected from the population

Which is an example of a continuous variable?

T/F: A test must first be reliable before it can be valid.

Continuous interval or ratio data are displayed with these:

Inferential statistics uses the following:

Given the following values of r, which is the strongest?

A large health care organization wants to explore employee wellness by randomly selecting 5 locations then surveying all

What is an example of ratio data?

This visualization is best for displaying data over time.

Which chart would you use to observe the relationship between two numerical values?

As r approaches 0 how would we describe the relationship?

The average variation from the mean

This is the value obtained by: ∑X/n

For this scale of measurement the mean can be calculated, but may not be meaningful

We may work together with peers on the test.

Reasons to use a convenience sample:

What does X represent?

The Celsius temperature scale is this type of measure:

Chose a person randomly, what is the probability that they had cancer, given that they were on AHA diet?

Choose a person randomly, what is the probability that they were on a Mediterranean diet given that they were healthy?

T/F: standard deviation = variance squared

Which chart measures continuous data?

The probability of drawing two cards from a deck and both being jacks (no replacing cards)

What is a characteristic of the function SDTEV.S?

Frequencies & proportions are displayed with these

The probability of flipping heads two times in a row is = 0.5+0.5

Mode can be computed for nominal data

Scales of measurement include:

Comparing two different tests (such as an oral and ear thermometer) we can determine:

Choose a person randomly, what is the probability of having cancer?