The correlation coefficient is

A statistical measure that describes the strength and direction of a relationship between two variables.

A mathematical formula used to calculate the mean of two variables

A measure of central tendency in statistics

A method to determine the probability of an event

If r=-1 or +1 our variables have

a perfect positive or negative relationship.

a strong positive or negative relationship.

flawed data because r cannot be a whole number or integer.

If r is close to -1 or +1 our variables have

a strong positive or negative relationship.

a perfect positive or negative relationship.

flawed data because r cannot be a whole number or integer.

If r is close to -0.5 or +0.5 our variables have

a moderate positive or negative relationship.

a perfect positive or negative relationship.

a strong positive or negative relationship.

If r is close to 0, our variables have

a perfect positive or negative relationship.

a strong positive or negative relationship.

a moderate positive or negative relationship.

A lurking variable is

a variable that is not included in the research study but affects the results

a variable that is always controlled in an experiment

a variable that has a strong correlation with the dependent variable

a variable that is directly manipulated by the researcher

The coefficient of determination (r 2 ) is

A statistical measure representing the proportion of the variance for a dependent variable explained by an independent variable.

is the linear relationship between two numerical variables is approximated using a straight line

is a guideline for how data is distributed in a normal distribution.

is a straight line drawn on a plane to connect points on x and y coordinates.

is a plane curve which is mirror-symmetrical and is approximately U-shaped.

Our observed value is (a)_____ and our predicted value is (b)_____.

(a) the data point that is on our scatter plot (b) the data point that rests on our regression line

(a) the data value at the origin point of our graph (b) at the top peak of our graph

(a) the data value at the origin (b) the data value where x = 0

differences between the observed values and the values predicted by the model

How many residuals are there in one dataset?

The number of residuals in one dataset is equal to the number of observations in that dataset.

The number of residuals in one dataset is always zero.

Residuals are only present in regression analysis, not in general datasets.

The number of residuals in one dataset is equal to the number of variables in that dataset.

Because when we add up our residuals and they cancel each other out, we have to

square our residuals before adding them

multiply them by 2 before adding them

round them to the next whole number before adding them

find the square root of our residuals before adding them

When talking about our regression line, this variable

"y hat" emphasizes that the points that satisfy our equation are just predicted

"y" emphasizes that the points that satisfy our equation are just predicted

"y" is the observed value of our graph that is paired with a predicted x value

"y hat" is the observed value of our graph that is paired with a predicted x value

Which variable/part of our equation represents the slope and y-intercept of our line?

slope: $$b_1$$ y-intercept: $$b_0$$

slope: y hat y-intercept: $$\ b_0$$

slope: $$b_0$$ y-intercept: y hat

slope: $$b_0$$ y-intercept: $$b_1$$

What is the slope of a line?

The slope is the estimated change in the response variable (y) for a unit increase of the explanatory variable (x).

The slope of a line is the length of the line segment

The slope of a line is always negative

The slope of a line is the y-intercept

What is the y-intercept?

The y-intercept is the estimated value of response variable (y) when the explanatory variable (x) is equal to 0

The y-intercept is the point where the graph crosses the x-axis.

The y-intercept is the slope of the graph.

The y-intercept is the highest point on the graph.

STATS Module 1 Part II.

University

•

35 Qs

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STATS Module 1 Part II.

Quiz

•

Mathematics

•

University

•

Practice Problem

•

Easy

•

CCSS

HSS.ID.B.5, HSS.ID.B.6B, HSS.ID.C.9

Standards-aligned

Jay Guerrero

Used 6+ times

FREE Resource

35 questions

Show all answers

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The z-score

indicates the number of standard deviations a given value is above or below the mean.

a statistical measurement used to validate a hypothesis against observed data.

a measure of how dispersed the data is in relation to the mean.

refers to either of two closely related concepts: the codomain of the function, or the image of the function.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is a percentile?

A percentile is a measure indicating the value below which a given percentage of observations in a group of observations fall.

A percentile is a measure of dispersion in a dataset.

A percentile is a measure of central tendency in a dataset.

A percentile is a measure of correlation between two variables.

What is a quartile?

A quartile is a type of unit of measurement used in cooking recipes.

A quartile is a type of musical instrument.

A quartile is a type of geometric shape.

A quartile divides a data set into four equal parts, each representing 25% of the data.

Define interquartile range.

The interquartile range is the sum of all quartiles in a dataset.

The interquartile range is the difference between the third quartile (Q3) and the first quartile (Q1) of a dataset.

The interquartile range is the difference between the maximum and minimum values in a dataset.

The interquartile range is the average of the first and third quartiles in a dataset.

To find our outliers we have to determine our

data visualization

outlier detection

data cleaning

fences

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What graph is shown here?

histogram

boxplot

bar graph

line plot

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

This graph's distribution is

symmetrical

right-skewed

left-skewed

outliered

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STATS Module 1 Part II.

35 questions

The z-score

What is a percentile?

What is a quartile?

Define interquartile range.

To find our outliers we have to determine our

What graph is shown here?

This graph's distribution is

This graph's distribution is

This graph's distribution is

A scatterplot is

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