Quiz about Stats Vocabulary Review

Question 1

_______ is a part of a group being surveyed.

Accepted Answer

Sample

Answer

Population

Answer

Random Sample

Answer

Quartile

Question 2

_______ is the entire group of objects or individuals considered for research.

Accepted Answer

Population

Answer

Sample

Answer

Random Sample

Answer

Quartile

Question 3

What's your favorite subject in school?

Accepted Answer

Categorical

Answer

Quantitative

Question 4

How many siblings do you have?

Accepted Answer

Quantitative

Answer

Categorical

Question 5

Which of the following lists all parts of the five number summary?

Accepted Answer

Minimum, Quartile 1, Median, Quartile 3, and Maximum

Answer

Mean, Median, Mode, Range, and Total

Answer

Smallest, Q1, Q2, Q3, and Q4

Answer

Minimum, Maximum, Range, Mean, and Median

Question 6

What is a the meaning for "median"?

Accepted Answer

B. middle

Answer

A. fair share

Answer

C. repeats the most

Answer

D. variation

Question 7

In order to find the median, the data must be sorted from least to greatest first.

Accepted Answer

A. True

Answer

B. False

Question 8

What measure of center is best to use when we have outliers?

Accepted Answer

median

Answer

mean

Answer

mode

Answer

range

Question 9

When analyzing numerical data, the best measure of center with NO outlier is:

Accepted Answer

mean

Answer

median

Answer

mode

Answer

range

Question 10

If a number is added to the set that is near the mean, how does this affect standard deviation?

Accepted Answer

stay the same

Answer

increase

Answer

decrease

Answer

both increase and decrease

Question 11

Select all the types of measures of spread.

Accepted Answer

Standard Deviation

Accepted Answer

Range

Accepted Answer

Interquartile Range (IQR)

Answer

Mean

Answer

Median

Question 12

An outlier is a value in a data set that is much greater or much less than most of the other values in the data set.

Accepted Answer

True

Answer

False

Question 13

A normal curve has a ____ shape.

Accepted Answer

symmetrical

Answer

skewed left

Answer

skewed right

Answer

bimodal

Question 14

In a normal curve, what percent of the data falls within one standard deviation of the mean?

Accepted Answer

68%

Answer

95%

Answer

99.7%

Answer

50%

Question 15

In a normal curve, what percent of the data falls within two standard deviations of the mean?

Accepted Answer

95%

Answer

68%

Answer

99.7%

Answer

50%

Question 16

What is the purpose of z-scores?

Accepted Answer

to describe the exact location of a score within a distribution

Answer

to find the mean of the distribution

Answer

to describe the shape of the distribution

Answer

to find the standard deviation of the distribution

Question 17

How is the graph distributed?

Accepted Answer

Slightly skewed to the right.

Answer

It is clearly Normal Distribution!

Answer

Slightly skewed to the left.

Answer

It is clearly Uniform Distribution!

Question 18

What does a scatter plot look like?

Accepted Answer

A graph that shows the relationship of two data sets.

Answer

A graph that shows information that is connected in some way.

Answer

A graph drawn using rectangular bars to show how large each value is.

Answer

A graph that shows data changing over time.

Question 19

Describe the correlation coefficient:

r = -0.98

Accepted Answer

Strong negative

Answer

Strong positive

Answer

Weak positive

Answer

Weak negative

Question 20

What is a line of best fit used for?

Accepted Answer

To make predictions

Answer

To make the graph look pretty

Answer

To connect the points

Answer

To make it look like you know what you are doing

Question 21

Residuals are . . .

Accepted Answer

the difference between the observed response and the values predicted by the model

Answer

possible models not explored by the researcher

Answer

variation in the response variable that is explained by the model

Answer

data collected from individuals that is not consistent with the rest of the group

Question 22

In a scatterplot r is called

Accepted Answer

Correlation coefficient

Answer

Coefficient of Determination

Answer

Regression Line

Answer

Slope

Question 23

The Coefficient of Determination is

Accepted Answer

r2

Answer

r

Answer

$$r imes\frac{s_y}{s_x}$$

Answer

a + bx

Question 24

In a scatter plot what does the x axis (horizontal) of the graph represent?

Accepted Answer

Explanatory Variable

Answer

Response Variable

Answer

The X Values of the function

Question 25

In a scatter plot what does the y axis (vertical) of the graph represent?

Accepted Answer

Response Variable

Answer

Explanatory Variable

Answer

The X Values of the function

Question 26

What does my correlation coefficient (r-value) represent?

Accepted Answer

Its a summary of the direction of the correlation and the strength of the correlation.

Answer

How much the response variable increases by for every explanatory variable

Answer

The slope of my regression line

Answer

If you choose this one its wrong.

Question 27

If the linear correlation coefficient between two variables is 0.88, then the coefficient of determination is ________.

Accepted Answer

0.7744

Answer

0.88

Answer

0.44

Answer

Cannot be determined

Question 28

How do you find the equation of the least squares regression line?

Accepted Answer

y = a + bx

Answer

y = bx + m

Answer

y = ax + c

Answer

y = ax + b

Question 29

How do you interpret the coefficient of determination ( r²) in least squares regression?

Accepted Answer

The coefficient of determination represents the proportion of the variance in the response variable that can be explained by the explanatory variable(s).

Answer

The coefficient of determination represents the correlation between the explanatory and response variables.

Answer

The coefficient of determination represents the average of the explanatory and response variables.

Answer

The coefficient of determination represents the proportion of the variance in the explanatory variable that can be explained by the response variable(s).

Question 30

The ___________________of an event occurring P(A) may be thought of as an unconditional probability. It is not conditioned on another event. taking place. Example: the probability that a card drawn is red P(red) = 0.5

Accepted Answer

marginal probability

Answer

conditional probability

Answer

exponential probability

Answer

normal probability

Question 31

The ___________________of an event occurring is written P(A|B). The probability of A happening is conditional on if B happens first. Example: the probability that an Ace is drawn given that it is red P(Ace | red) = 0.08

Accepted Answer

conditional probability

Answer

marginal probability

Answer

exponential probability

Answer

normal probability

Question 32

This is an example of a ....

Accepted Answer

normal distribution

Answer

skewed distribution

Answer

exponential distribution

Answer

discrete distribution

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